This is a practical and electronic production kit, consisting of an - Bluetooth module, 8002 amplifier audio, and peripheral components. After production, it can be connected to a mobile phone Bluetooth or played through an audio socket signal. Under the action of the casing, the 3W speaker provides better sound quality. The highly transparent acrylic shell design allows for a clear view of the internal structural circuits, making it suitable for practical teaching and training in electronic fundamentals and skills, as well as for electronic enthusiasts and beginners. Note: The products are loose parts and need to be welded, assembled and debugged by the themselves. NOTE: This is a DIY kit and needs to be assembled by yourself. Product name: Dual channel stereo bluetooth speaker kit Operating voltage: DC5V (Micro-to USB interface) Color: Transparent Material: PCB+Acrylic+Electronic Component Package Contents: 1 x DIY kit with shell 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.