Power on: Pre and hold the power on/off button until the LED lights upShutdown: Pre and hold the power on/off button until the LED is offCharging: Use the DC-5V charger and micro usb charging cable. The red light is on during charging. When the battery is fully charged, Red light off. Switch mode:1)RX: Receive mode, indicator: blue LED2)TX: Transmit mode, indicator light: red LED RX mode:The receiving mode can be used in scenes such as home, car, etc., so that speakers without Bluetooth function can have Bluetooth function, and realize wirele connection with mobile phones, tablets and other devices, and bid farewell to wired constraints. how to use:1)First switch RT01 to receive mode (RX),Pairing name: RT01, find RT01 in the Bluetooth settings of the phone to pair. The blue light flashes twice a second during the pairing proce, and the blue light flashes once every three seconds after the pairing is succeful.2)Plug one end of the audio cable into the audio input of the speaker and the other end into the audio of the RT01,Then you can play music. TX mode:The launch mode can be used on computers, TVs and other non-Bluetooth-enabled sound source devices to help these devices transmit sound to Bluetooth speakers, Bluetooth headsets, etc. TX mode will automatically search for other Bluetooth receiving devices (such as Bluetooth headset, Bluetooth speaker, Bluetooth receiver, etc.), The red light flashes twice a second during the pairing proce, and the red light flashes once every three seconds after the pairing is succeful. How to use:1)Plug one end of the audio cable into the audio output of the devices and the other end into the audio of the RT01.2)Confirm that it is in TX mode (red light flash). The RT01 will automatically search for Bluetooth headset or Bluetooth speaker pairing. After the pairing is succeful, the sound of the TV or computer can be transmitted to Bluetooth speakers and other devices through RT01 for playback. Bluetooth handsfree callingIn the receiving mode, this product supports Bluetooth hands-free calling. When the mobile phone calls, short pre the M button to answer the call. SpecificationsModel: RT01Technologies: BT5.0, A2DP, AVRCPOperation Range: Up to 10m / 33ft (without any blocking objects)Pairing name:RT01Charging Time: 2 hoursWorking time:12 hoursBattery Type: Li-Polymer (400mAh)Dimensions: 65mm*45mm*21mmWeight: 40g Package Content1x Bluetooth 5.0 Audio Transmitter/Receiver Adapter1x Micro USB Power Cable1x 3.5 to RCA Cable1x 3.5 to 3.5 Cable1x User Manual