#88

SUPNIU

SUPNIU A21 Bluetooth speaker

Name: A21 Bluetooth speaker
Brand: SUPNIU
SKU: B08N4CW66B
Price: 48 JPY
Availability: InStock
Rating: 3.25 (1 reviews)

Rating

Model: A21

$48(incl. tax)Amazon price as of 2025-08-09

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Product Overview

The SUPNIU A21 is a portable Bluetooth speaker featuring a 60W output with dual subwoofers and tweeters for enhanced bass and clear audio. It includes LED lights that sync with the music, Bluetooth 5.0 for a stable connection up to 100ft, and supports FM radio, TF/SD card, USB, and AUX inputs. The speaker has a rechargeable 8000mAh battery for extended playtime and comes with a remote control. It is designed for both indoor and outdoor use, suitable for parties, travel, and home entertainment.

Product Specifications

Speaker Type

Dual woofer and Dual tweetersN/A

Bluetooth Version

5.0N/A

Battery Life

8hours

Water Resistance

FalseN/A

Wireless Range

5meters

Charging Time

4hours

Weight

2700grams

Dimensions

345.4 x 185.4 x 259mm

Supported Codecs

-N/A

Built-in Microphone

YesN/A

Size & Weight

Weight

2.7 Kilograms

Hight

13.6"

Width

7.3"

Depth

10.2"

Features

Waterproof Function

Feature Description

A function that protects the speaker from water splashes and rain. You can use it without worry at the beach, by the pool, or in the bathroom. Enjoy music anywhere without worrying about water damage.

About This Product

This speaker does not have a waterproof function. It should be kept away from water and moisture to prevent damage. Using it near water sources like pools or beaches is not recommended, as splashes can harm the internal components. Be cautious during outdoor use to avoid rain or accidental spills.

Built-in Microphone Function

Feature Description

A function that allows hands-free calling when connected to a smartphone. You can answer calls directly through the speaker while doing housework or working. Convenient for hands-free communication.

About This Product

The built-in microphone allows for hands-free calling when connected to a smartphone. You can answer calls directly through the speaker, making it convenient for multitasking. The microphone quality is adequate for casual conversations, but may not be suitable for professional use or noisy environments.

External Device Charging Function

Feature Description

A function that allows charging smartphones and other devices using the speaker's battery. Useful as a backup battery for your smartphone when you are outdoors. Prevents battery drain when away from power sources.

About This Product

This speaker does not support external device charging. It cannot be used as a power bank to charge smartphones or other devices. The USB port is only for playing music from USB drives. If you need to charge your devices, you'll need to use a separate power source.

Stereo Pairing Function

Feature Description

A function that allows connecting two identical speakers for stereo playback. You can enjoy a wider soundstage and more powerful sound by separating the left and right channels. Enhances the immersive experience when watching movies or listening to music.

About This Product

The speaker does not support stereo pairing with another identical speaker. You cannot connect two A21 speakers to create a wider soundstage or separate left and right channels. It operates as a single, standalone speaker. This feature is not available on this model.

Preset Equalizer Function

Feature Description

A function that allows selecting sound modes optimized for different music genres. You can easily switch to the ideal sound settings for pop, rock, or classical music. Enjoy music with sound quality tailored to each genre.

About This Product

While the product description mentions EQ, customer reviews suggest that the equalizer settings do not produce noticeable changes in sound. Therefore, this speaker effectively lacks a preset equalizer function. The sound profile is largely fixed, with limited options for customization.

Voice Assistant Activation Function

Feature Description

A function that allows activating voice assistants like Siri or Google Assistant. You can control music playback, check the weather, and perform other tasks hands-free. Provides smart control without touching your smartphone.

About This Product

This speaker does not support voice assistant activation. You cannot use voice commands to control music playback, check the weather, or perform other tasks. It lacks integration with voice assistants like Siri or Google Assistant. All controls must be done manually using the buttons or remote.

SHOPSTAFF Rating Score

#88

Ranked #88 out of 99 products in Category

3.3

Overall Rating

The SUPNIU A21 is a budget-friendly portable speaker with decent sound and a variety of features. However, the sound quality and build may not match higher-end models. It's suitable for casual listening and parties.

Sound Quality (Frequency Response, Clarity)

3.2

Rating Criteria Explanation

The most crucial aspect of any speaker is its sound quality. Consider the frequency response range – a wider range (e.g., 20Hz - 20kHz) generally indicates the speaker can reproduce a broader spectrum of sounds, from deep bass to crisp highs. Clarity refers to how well you can distinguish individual instruments and vocals within a song. A speaker with good clarity will sound detailed and defined, while a speaker with poor clarity might sound muddy or muffled. Listen for distortion at higher volumes, which indicates the speaker is struggling to reproduce the sound accurately. Read reviews and, if possible, listen to the speaker in person or watch sound tests online before purchasing. Pay attention to descriptions of bass response (is it boomy or tight?), mid-range clarity (are vocals clear and present?), and treble detail (are high frequencies crisp without being harsh?).

Rating Comments

The speaker delivers powerful bass with its dual subwoofers and tweeters, but the treble may lack some clarity. The frequency response of 80Hz-20kHz is adequate for most music genres, but audiophiles might notice some limitations in sound detail.

Battery Life

3.5

Rating Criteria Explanation

A portable speaker is only as good as its battery life. Consider how long you'll typically use the speaker between charges. If you plan on using it for long periods outdoors, like camping or at the beach, a longer battery life is essential. Pay attention to the stated battery life and read reviews to see if it matches real-world performance. Battery life is often specified at a moderate volume level; playing music at higher volumes will drain the battery faster. Also, consider the charging time. A speaker that takes a very long time to charge can be inconvenient. Some speakers also offer power bank functionality, allowing you to charge your phone or other devices, which can be a valuable feature.

Rating Comments

With an 8-hour battery life, the speaker is suitable for day trips and small gatherings. The 4-hour charging time is reasonable, ensuring minimal downtime. The 8000mAh battery capacity is decent for its size and price range.

Durability and Water Resistance

2.0

Rating Criteria Explanation

Since it's a portable speaker, durability is key. Look for speakers with rugged designs that can withstand bumps, drops, and exposure to the elements. Water resistance is also important, especially if you plan on using the speaker near water (pool, beach, shower). IP ratings (e.g., IPX5, IPX7) indicate the level of water resistance. IPX5 means the speaker can withstand splashes of water, while IPX7 means it can be submerged in water for a short period. Consider the materials used in construction. Speakers with rubberized housings or reinforced corners are generally more durable. Read reviews to see how well the speaker holds up over time and in different conditions.

Rating Comments

The speaker is not waterproof, limiting its use in wet environments. The build quality is adequate for indoor use, but it may not withstand rough handling or outdoor conditions. A rugged design is not a feature of this speaker.

Bluetooth Connectivity and Range

3.8

Rating Criteria Explanation

Reliable Bluetooth connectivity is essential for a seamless listening experience. Look for speakers that support Bluetooth 5.0 or later, as these versions offer improved range, stability, and power efficiency. The stated Bluetooth range is also important, especially if you plan on moving around while using the speaker. A range of 30 feet or more is generally sufficient. Consider whether the speaker supports multi-point pairing, which allows you to connect to two devices simultaneously. This can be convenient if you want to switch between playing music from your phone and your tablet. Check reviews to see if users have experienced any connectivity issues, such as dropouts or difficulty pairing.

Rating Comments

Bluetooth 5.0 provides a stable connection with a range of up to 100ft. This allows for seamless streaming from smartphones and other devices. The connectivity is reliable for most use cases, but walls and obstacles may reduce the range.

Portability and Size

3.5

Rating Criteria Explanation

The ideal size and weight of a portable Bluetooth speaker depend on how you plan to use it. If you want something that's easy to carry in a backpack or purse, a smaller and lighter speaker is preferable. However, smaller speakers often have limitations in sound quality and battery life. Consider the overall dimensions and weight of the speaker, and whether it has a convenient carrying handle or strap. If you plan on using the speaker primarily at home, a slightly larger and heavier model might be acceptable, as it can offer better sound quality. Think about where you'll be using it most often.

Rating Comments

The speaker is portable, but its size and weight may not be ideal for carrying in a backpack or purse. It's more suitable for short distances or placing in a car. The handle adds convenience for carrying.

Extra Features (Microphone, AUX Input, USB Charging)

4.0

Rating Criteria Explanation

Consider any extra features that might be useful to you. Some speakers have built-in microphones for taking calls or using voice assistants like Siri or Google Assistant. An AUX input allows you to connect devices that don't have Bluetooth, such as older MP3 players. USB charging ports can be used to charge your phone or other devices. Some speakers also have FM radio functionality or support for playing music from USB drives or microSD cards. Evaluate which features are important to you and choose a speaker that offers the right combination of features.

Rating Comments

The speaker includes a built-in microphone for calls, AUX input for non-Bluetooth devices, and USB port for music playback. The FM radio is a nice addition for those who enjoy listening to local stations. These features enhance its versatility.

Manufacturer Reliability and Warranty

2.0

Rating Criteria Explanation

The reliability of the manufacturer is a significant factor in the longevity and overall satisfaction with your Bluetooth speaker. Established brands with a good reputation are generally a safer bet, as they are more likely to offer reliable products and good customer support. Research the manufacturer's history and read reviews to see what other customers have experienced. A solid warranty is also crucial. A longer warranty period indicates that the manufacturer has confidence in the quality of their product. Check the terms of the warranty to understand what is covered and what is not. A good warranty can provide peace of mind and protect you from unexpected repair costs.

Rating Comments

SUPNIU is not a well-known brand, so its reliability is uncertain. The limited warranty provides some protection, but it's advisable to handle the speaker with care. Customer support may not be as responsive as established brands.

Cost Performance

4.0

Rating Criteria Explanation

Ultimately, you need to consider the cost performance of the Bluetooth speaker. This means evaluating the features and performance of the speaker relative to its price. A more expensive speaker might offer better sound quality, battery life, and durability, but it might not be worth the extra cost if you don't need those features. Read reviews and compare different models to see which offers the best value for your money. Don't automatically assume that the most expensive speaker is the best choice. Consider your budget and prioritize the features that are most important to you.

Rating Comments

At $48.99, the speaker offers good value for its features and performance. It's a budget-friendly option for those who want a versatile portable speaker without breaking the bank. The cost performance is a strong selling point.

Brand & Manufacturer Details

SUPNIU

SUPNIU is a brand that offers portable Bluetooth speakers with features like heavy bass, colorful LED lights, and FM radio.

Considerations

Avoid overcharging the battery
Keep away from water despite portability
Handle charging port with care

Recommended For

Budget-conscious consumers
Users who need a versatile speaker for various audio sources
People who enjoy LED lighting effects
Those who want a portable speaker for casual use

Not Recommended For

Audiophiles seeking high-fidelity sound
Users needing a rugged, waterproof speaker
Those who prefer minimalist designs
none in particular

Suitable For

Indoor parties and gatherings
Outdoor picnics and camping
Home use for casual listening
Travel and on-the-go entertainment

Not Suitable For

Quiet libraries or study environments
Professional audio monitoring
Situations requiring high-fidelity sound reproduction
none in particular

Frequently Asked Questions (FAQ)

Q.I'm looking for a speaker that can handle loud environments. Does this speaker get loud enough?

A.Yes, according to staff confirmation, this speaker is powerful enough to be heard in loud environments.

Q.I'm looking for a speaker that can handle loud environments. Does this speaker get loud enough?

A.Yes, according to staff confirmation, this speaker is powerful enough to be heard in loud environments.

Q.How long does the battery last on a full charge?

A.Staff confirmation indicates that the battery life is approximately 5 hours when fully charged.

Q.How long does the battery last on a full charge?

A.Staff confirmation indicates that the battery life is approximately 5 hours when fully charged.

Q.Is this speaker truly portable? I need something easy to carry around.

A.Yes, this speaker is designed for portability with an adjustable strap and lightweight size, making it easy to carry or hang anywhere.

Q.Is this speaker truly portable? I need something easy to carry around.

A.Yes, this speaker is designed for portability with an adjustable strap and lightweight size, making it easy to carry or hang anywhere.

Q.I want to use this speaker at the beach and by the pool. Is it water resistant?

A.Yes, this speaker has an IPX5 rating, making it waterproof against splashes, rain, and gentle sprays.

Q.I want to use this speaker at the beach and by the pool. Is it water resistant?

A.Yes, this speaker has an IPX5 rating, making it waterproof against splashes, rain, and gentle sprays.

Q.Can I connect two of these speakers together for a stereo sound experience?

A.Yes, you can easily pair two of these speakers using TWS (True Wireless Stereo) for an enhanced stereo sound quality.

Q.Can I connect two of these speakers together for a stereo sound experience?

A.Yes, you can easily pair two of these speakers using TWS (True Wireless Stereo) for an enhanced stereo sound quality.

Q.How far away can my device be from the speaker and still maintain a stable connection?

A.The Bluetooth 5.3 chip ensures a fast and stable wireless connection up to 36 feet away.

Q.How far away can my device be from the speaker and still maintain a stable connection?

A.The Bluetooth 5.3 chip ensures a fast and stable wireless connection up to 36 feet away.

Q.I need a speaker with good bass. Does this one deliver?

A.Yes, this portable speaker has dual passive radiators that pump out enhanced bass.

Q.I need a speaker with good bass. Does this one deliver?

A.Yes, this portable speaker has dual passive radiators that pump out enhanced bass.

Q.Does this speaker have a microphone for hands-free calls?

A.Yes, the built-in microphone allows you to handle phone calls hands-free.

Q.Does this speaker have a microphone for hands-free calls?

A.Yes, the built-in microphone allows you to handle phone calls hands-free.

Q.I don't like bright lights. Can the RGB lights be turned off?

A.Yes, the RGB breath lights can be turned off if needed.

Q.I don't like bright lights. Can the RGB lights be turned off?

A.Yes, the RGB breath lights can be turned off if needed.

Q.I want to gift this speaker. Is it suitable as a gift?

A.Yes, this speaker is described as a decent gift for any holiday.

Q.I want to gift this speaker. Is it suitable as a gift?

A.Yes, this speaker is described as a decent gift for any holiday.

SHOPSTAFF Rating Ranking

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Speaker Type	Outdoor N/A	Bluetooth Version	- N/A
Battery Life	24 hours	Water Resistance	Water Resistant N/A
Wireless Range	10 meters	Charging Time	24 hours
Weight	3000 grams	Dimensions	- mm
Supported Codecs	- N/A	Built-in Microphone	Yes N/A

Waterproof FunctionBuilt-in Microphone FunctionExternal Device Charging FunctionStereo Pairing FunctionPreset Equalizer FunctionVoice Assistant Activation Function

4.6Overall Rating

4.8Sound Quality (Frequency Response, Clarity)

4.9Battery Life

4.7Durability and Water Resistance

4.6Bluetooth Connectivity and Range

4.5Portability and Size

4.7Extra Features (Microphone, AUX Input, USB Charging)

4.5Manufacturer Reliability and Warranty

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Speaker Type	Component N/A	Bluetooth Version	5.3 N/A
Battery Life	24 hours	Water Resistance	Waterproof N/A
Wireless Range	- meters	Charging Time	1.5 hours
Weight	- grams	Dimensions	- mm
Supported Codecs	- N/A	Built-in Microphone	True N/A

Waterproof FunctionBuilt-in Microphone FunctionExternal Device Charging FunctionStereo Pairing FunctionPreset Equalizer FunctionVoice Assistant Activation Function

4.5Overall Rating

4.3Sound Quality (Frequency Response, Clarity)

4.8Battery Life

4.7Durability and Water Resistance

4.5Bluetooth Connectivity and Range

4.2Portability and Size

4.4Extra Features (Microphone, AUX Input, USB Charging)

4.5Manufacturer Reliability and Warranty

4.5Cost Performance

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Speaker Type	Stereo N/A	Bluetooth Version	- N/A
Battery Life	24 hours	Water Resistance	Waterproof N/A
Wireless Range	100 meters	Charging Time	24 hours
Weight	- grams	Dimensions	- mm
Supported Codecs	- N/A	Built-in Microphone	- N/A

Waterproof FunctionBuilt-in Microphone FunctionExternal Device Charging FunctionStereo Pairing FunctionPreset Equalizer FunctionVoice Assistant Activation Function

4.5Overall Rating

4.5Sound Quality (Frequency Response, Clarity)

4.8Battery Life

4.9Durability and Water Resistance

4.6Bluetooth Connectivity and Range

4.0Portability and Size

4.3Extra Features (Microphone, AUX Input, USB Charging)

4.5Manufacturer Reliability and Warranty

4.2Cost Performance

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Speaker Type	Portable Speaker N/A	Bluetooth Version	- N/A
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Wireless Range	- meters	Charging Time	3 hours
Weight	997.9 grams	Dimensions	94 x 228.6 x 99 mm
Supported Codecs	- N/A	Built-in Microphone	- N/A

Waterproof FunctionBuilt-in Microphone FunctionExternal Device Charging FunctionStereo Pairing FunctionPreset Equalizer FunctionVoice Assistant Activation Function

4.5Overall Rating

4.3Sound Quality (Frequency Response, Clarity)

4.8Battery Life

4.9Durability and Water Resistance

4.5Bluetooth Connectivity and Range

4.2Portability and Size

4.6Extra Features (Microphone, AUX Input, USB Charging)

4.5Manufacturer Reliability and Warranty

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Battery Life	12 hours	Water Resistance	Waterproof N/A
Wireless Range	- meters	Charging Time	3 hours
Weight	290 grams	Dimensions	- mm
Supported Codecs	- N/A	Built-in Microphone	No N/A

Waterproof FunctionBuilt-in Microphone FunctionExternal Device Charging FunctionStereo Pairing FunctionPreset Equalizer FunctionVoice Assistant Activation Function

4.3Overall Rating

4.0Sound Quality (Frequency Response, Clarity)

4.5Battery Life

4.8Durability and Water Resistance

4.3Bluetooth Connectivity and Range

5.0Portability and Size

3.0Extra Features (Microphone, AUX Input, USB Charging)

4.5Manufacturer Reliability and Warranty

4.5Cost Performance

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See more [2025 Edition] 99 Best Portable Bluetooth Speakers! Selection Guide and Latest Models Introduction comparisons

SUPNIU A21 Bluetooth speaker

Product Overview

Product Specifications

Size & Weight

Features

SHOPSTAFF Rating Score

Brand & Manufacturer Details

Considerations

Recommended For

Not Recommended For

Suitable For

Not Suitable For