Customized products for verifying the functionality of Bluetooth playback module and GD3800D voice module. Built in dual channel stereo amplifier circuit, with a maximum power of 18W, can drive 4 Euro 8W bookshelf speakers. Built in GD3800D voice playback chip, supports reading audio files directly from TF card or USB flash drive for playback. USB flash drive has higher priority than TF card, so if both TF card and USB flash drive are used, the content of USB flash drive will be played first.
This chip supports USB sound card mode. After connecting to a computer via USB, it will be recognized as a sound card device and can be used normally. Built in Bluetooth playback chip, which can be connected to the Bluetooth on a mobile phone for playback. You can select various functional modules through the onboard power supply selection line. If no module is selected, it can be directly used as an active power amplifier speaker. On board button interface, after connecting to the matching button board, the playback process can be manually operated, such as fast forward, rewind, volume adjustment, etc.