RT02 USB Bluetooth Audio Adapter Receives Transmits 2-in-1 Bluetooth 5.0 Hands-free Talk Car Bluetooth Receiver 1. Bluetooth version: BT5.0, A2DP, AVRCP 2. Receiving distance: up to 10m 33ft 3. Pairing name: RT02 4. Transmission mode: red indicator light 5. Receiving method: blue indicator light 6. Dimensions: 32mm x 17mm x 8.5mm 7. Package content: 1x Bluetooth 5.0 audio transmitter and receiver 1x 3.5mm auxiliary cable 1x user manual 8. Button description "+": long press to switch to the next song; short press volume + "-": long press to switch to the previous song; short press volume "M": switch modepauseplayanswer phone 9. Note: The button can only be used in receiving mode 10. Mode switching: Long press the M button to switch: red light on means switching to transmitting mode; blue light on means switching to receiving mode 11. For computer: When using it on a computer, it can be used to connect a Bluetooth headset or Bluetooth speaker. No audio cable or driver is needed, plug and play (only audio cannot transmit data). 12. How to use: Switch to transmission mode, the red light flashes, and turn on the Bluetooth speaker or Bluetooth headset at the same time, they will be paired automatically. After the pairing is successful, the red light will be on. 13. For other devices: When used on other non-computer devices with audio output (such as TV), it can be used to connect Bluetooth headsets or Bluetooth speakers 14. How to use: 01. Insert one end of the audio cable into the audio output of the TV and the other end into the audio interface of RT02. 02. Insert RT02 into USB (DC 5V) and confirm that it is in transmission mode (red light flashes). RT02 will automatically search for Bluetooth headset or Bluetooth speaker pairing. 15. For home speakerscar speakers, etc. RT02 can help home speakers, wired headsets, and car speakers upgrade to have Bluetooth function. Establish a Bluetooth connection with the mobile phone. 16. How to use: 01. Insert one end of the audio cable into the audio output of the speaker and the other end into the audio of RT02. 02. Insert RT02 into USB (5V DC) and confirm that it is in receiving mode (blue light flashes). Find the pairing name in the phones Bluetooth settings: RT02, click to pair. 17. Hands-free call: In the receiving mode, after pairing with the mobile phone, if the mobile phone calls, you can talk through the built-in high-definition MIC, press the M button to connect Listen or hang up the phone.