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Mode Button: Short press: Switch mode
Long press: Standby mode on/o
Quickly press twice: System update (with rmware le in USB disk drive)
Vol – Button: Short press: Decrease volume
Long press: Play prev track
Play/Pause Button: Short press: Play or Pause music
Quickly press twice: Disconnect current Bluetooth connection
Vol + Button: Short press: Increase volume
Long press: Play next track
LED: Indicate current status and input source
When blue light is on, indicates BT TX mode is on and the input source light indicates the current
input source.
During Firmware update, all the indicator lights will turn on, do not turn o power at this time, please
wait till all indicator lights turn o and AUX light turns back on.
When the device enters protection mode, all indicator lights will start ashing, please turn o the
device and check for cause. (usually cause by over heat or input short circuits)
IR receiver: for IR remote controller
Optical input: To connect to music source device that has optical output
Aux input: To connect to music source device that has RCA or AUX output
Aux output: To connect to amplier or active speakers that has RCA or AUX input
USB Type-A port: For plugin USB disk drive to play stored music
USB Type-C/DC port: For plugin the power adaptor or connect to PC as USB DAC
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* Factory Reset: Press and hold Vol+ and Vol- to do factory reset