Package Include: 1 x Bluetooth 5.3 Transmitter Receiver 1 x 3.5MM Audio Cable 1 x RCA Audio Cable 1 x Power Cord 1 x Manual Connection Instructions: First: Connect the Bluetooth Transmitter Receiver to the device through the input/output interface， and select the transmission mode (TX) or receiving mode (RX) as needed. Second: When using the receiving mode (RX): turn on the mobile phone Bluetooth， search for C68""， and click Connect; When using the transmitting mode (TX): turn on the Bluetooth headset/speaker to enter the pairing state. This Bluetooth Transmitter Receiver will automatically search for nearby devices and connect. After the connection is successful， the screen stops flashing， you can start using it. Specifications: Bluetooth Version: Bluetooth 5.3 Bluetooth Transmission Distance: 10 m Bluetooth Transmission Protocol: EDR/A2DP/HSP/AVRCP Bluetooth Receiving Function: Connect to 1 mobile phone Bluetooth Transmitting Function: Connect to 1 pair of headphones Both Transmission and Reception Support USB/TF Card Supported Interfaces: AUX/Dual Channel/TF/U Disk/3.5 mm Audio Jack Compatible Devices: Various Speakers/Computers/TVs/Bluetooth Headsets/Wired Headsets/Projectors/Tablets/Mixers， etc.