1. ON/OFF: power switch;
2. DC 5V: charging interface;
3. Switch indicator;
4. Microphone: call function;
5. USB: Connect U disk (maximum support 32GB);
6. VOL-: Short press is to select the previous song; long press is to decrease the volume;
7. PLAY/PAUSE: Short press is to switch between pause and play; long press is to switch between USB / TF / FM / LINE IN / BLUETOOTH, short press is to automatically search channels in the radio FM state;
8. VOL+: Short press is to select the next song; long press is to increase the volume;
9. TF: Connect TF memory card (maximum support 32GB);
Bluetooth version: Bluetooth 5.0
With Bluetooth call function, power supply voltage is 5V, current requirement is above 2A
Music format: MP3 / WMA / WAV / FLAC / APE lossless format music
Power: 2*3W, connect 2 3W speakers
Radio FM frequency: 87.5-107.5 MHZ
Support function introduction: support MP3 / USB / TF / LINE IN / FM / BLUETOOTH / DC 5V
About the structure: Panel size: 71 * 22 MM, the depth of the board is 26 MM, the distance between the two screw positioning holes is 59MM
