Features::
Transmitter Mode
1. Plug the adapter into device with USB 5V power supply.
2. Set the adapter into transmitter mode (red light flashes).
3. Use 3.5mm audio cable to connect the audio equipment (TV, MP3, CD / DVD player, etc) and the adapter's audio port.
4. Turn on your Bluetooth headphones or other Bluetooth device and enter pairing state, your audio equipment will automatically search and pair with it, and red light will stays on after pairing succeeds.

USB Transmitter Mode (Suitable for computer and PS4 game console)
1. Plug the adapter into PC/PS4 game console's USB port.
2. Set the adapter into transmitter mode (red light flashes).
3. Turn on your Bluetooth headphones or other Bluetooth device and enter pairing state, PC/PS4 game console will automatically search and pair with it, and red light will stays on after pairing succeeds.

Receiver Mode
1. Plug the adapter into device with USB 5V power supply.
2. Set the adapter into receiver mode (blue light flashes).
3. Use 3.5mm audio cable to connect the audio equipment (speaker / car / home sound system, etc) and the adapter‘s audio port.
4. Search for ‘ZF-169S' on your phone's Bluetooth list for pairing, and blue light will stays on after pairing succeeds.

USB Receiver Mode (Suitable for speaker with USB port)
1. Plug the adapter into speaker's USB port.
2. Set the adapter into receiver mode (blue light flashes).
3. Search for ‘ZF-169S' on your phone's Bluetooth list for pairing, and blue light will stays on after pairing succeeds.

Note
1. A single adapter cannot transmit and receive audio at the same time, only as a separate receiver or transmitter.
2. Only one device can be connected at a time.
3. Phone calling are not supported.
4. Cannot achieve stereo.
5. 3.5mm audio cable is used to transfer audio. (Except for PC, PS4, and speakers that support USB flash drives)
6. Connecting the audio cable and USB port to the same device may cause noise. Try to power the product in other ways.
7. When pairing with a Bluetooth headphones/speaker, please turn off the Bluetooth of nearby Bluetooth devices to avoid affecting the pairing.
8. In any mode, long press the function button can clear the current pairing connection and search for pairing again.
9. Use the function button to switch from TX mode to RX mode, it will not be able to switch to TX mode immediately for 3 seconds, it can be switched normally after 3 seconds, it is not that the button is not sensitive.

Package Included:
1 x USB Bluetooth 5.0 Transmitter Receiver