Bluetooth 5.4 Amplifier Module Mono 5 W Class D 28.5 x 17.3 mm AUX Input 3.5 mm USB-C Charging TWS Purple Board for DIY Speaker
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The Bluetooth amplifier module is ready-made electronics for anyone who wants to build their own wireless speaker. On a single board measuring 28.5 x 17.3 mm, you will find a Bluetooth receiver, audio decoder, and amplifier, so you just need to solder on a speaker and a battery. The module uses Bluetooth 5.4 and, once powered on, identifies itself as BenLi, making it easy for your phone to find it in the list of devices. It then plays music from your mobile, tablet, or laptop without cables. A lit blue indicator and an audio signal confirm that the board is ready for pairing.
The amplifier operates in mono mode with a power output of 5 W and belongs to Class D, which is characterised by low losses and minimal heating. The module is designed for speakers with an impedance of 2 to 4 Ω and a power output of 3 to 10 W. The power supply voltage is DC 3.5 to 5 V, most commonly from a 3.7 V lithium cell, such as a polymer battery or a 18650 cell. The board features a USB-C connector for charging the connected battery, an AUX 3.5 mm input for wired audio sources, and a sliding power switch. An interesting feature is TWS: when you power on two of these modules simultaneously, they automatically connect to create a stereo speaker.
- Type – Bluetooth receiver with amplifier and audio decoder
- Bluetooth Version – 5.4
- Amplifier Power – 5 W mono Class D
- Power Supply Voltage – DC 3.5 to 5 V
- Current – 1 A
- Recommended Speaker – 2 to 4 Ω and 3 to 10 W
- Recommended Battery – 3.7 V lithium cell with a capacity of 300 to 2000 mAh or a 18650 cell
- Charging – USB-C connector and recommended charger 5 V 1 to 2 A
- Inputs and Controls – AUX 3.5 mm and power switch
- TWS Function – connection of two modules into a stereo setup
- Bluetooth Name – BenLi
- Board Dimensions – 28.5 x 17.3 mm
- Board Colour – purple
- Package Contents – 1 module without speaker and battery
When connecting, solder the speaker and lithium battery according to the manufacturer's schematic, and before the first power-up, check the correct polarity of the battery. If the blue indicator does not light up after powering on, immediately turn off the module and check the battery connection. The USB-C connector is used for charging the battery, and the charging current is limited to 500 mA, so the USB-C cable alone without a battery as a power source is insufficient. The board is suitable for home projects, such as a speaker in a wooden box, in a tin can, in a walnut shell, or as a replacement for electronics in an old computer speaker.
This small module thus combines everything necessary for wireless music transmission into a single piece of electronics. With a power output of 5 W, it will sound a smaller speaker in a room, workshop, or garden. Compact dimensions allow the board to be hidden even in very small enclosures. Charging via USB-C simplifies battery operation, and the TWS function offers expansion to a stereo setup with two modules. It is a practical foundation for DIY enthusiasts, students, and electronics lovers who want to create their own Bluetooth speaker.
Delivery
Delivery to address€1.99
Estimated delivery: 23 November – 4 December
Shipped from China
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Returns addressQX-BOX AEMALL RETURN
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28070 Alcala de Henares, Madrid
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About the seller
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Seller:
Yongkang Yongchang Electric Tools Co., Ltd
Address: West side, 3rd Floor, No 27, Zerong Road, Dahou Village, Tangxian Town, Jinhua City, Zhejiang, China
E-mail: 297288217@qq.com
Telephone: +86 135 6007 1153
Manufacturer:
Yongkang Yongchang Electric Tools Co., Ltd
Address: West side, 3rd Floor, No 27, Zerong Road, Dahou Village, Tangxian Town, Jinhua City, Zhejiang, China
E-mail: 297288217@qq.com
Telephone: +86 135 6007 1153
EU responsible person:
EU Consulten Srls
Address: Via Varesina 55, 20156 Milano, Italy
E-mail: Eu-consultenSrls@hotmail.com
Telephone: +39 328 583 2654
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