This kit consists of - bluetooth audio module, HT6872 power amplifier chip and peripheral components. After the production is completed, the power supply can be connected to the mobile phone Bluetooth to , and the audio signal can be input from the 3.5mm music socket for playback. The 3W speaker has a more beautiful sound quality under the action of a shell, and it has a music spectrum melody light circuit, and 5 LEDs can flash with the music melody.The kit can be used for electronic technical skills teaching and training, and is used by beginners of electronic enthusiasts. Product name: Bluetooth speaker, small power amplifier, mobile phone audio kit product Power supply method: USB Power cord: 5V DC Speaker power: 4 ohms 3 watts mono Color: As shown Material: PCB Package Contents: 1 x Bluetooth Speaker DIY Kit 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.