Instructions 1. Track back 2. On/off /Play/Pause Press and hold for Power On/Off. In USB/TF/Bluetooth mode, click to play/pause 3. Mode Click for source selection 4. Track forward 5. Charging port 6. TF card input slot 7. AUX Input port 8. USB input slot 9. Volume + Volume - Main Function Voice Prompt. USB.TF.Bluetooth.AUX .Voice call Parameters: Speaker: 57mm "4 Ω X2 Output power: 5W x2 Frequency Response:100Hz~20K Hz Bluetooth: Version: 5.
