This kit consists of MH-M18 Bluetooth audio module, 2018 power amplifier chip and peripheral components. After the production is completed and connected to the power supply, you can connect the mobile phone Bluetooth to play music, or you can input the audio signal from the 3.5mm music socket for playback. The 3W speaker has a better sound quality under the parent shell, and it has a music spect melody light circuit. The 5 LEDs can flash with the music melody, which gives people a pleasing feeling, very creative and interesting. The kit can be used for electronic technology skills teaching and training, and for electronic enthusiasts and beginners. Note: This is a DIY kit and needs to be assembled by yourself.<br><br>Power supply: USB power cable 5V DC Speaker power: 4Ω 3W mono Different batches may have different components, but it does not affect the use Colour: parent Material:PCB+components+acrylic Size:<br><br>Package Contents: 1 x DIY Bluetooth Speaker Kit with case<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.