Features: 1: USB is Directly Plugged into the USB Interface of the Computer when the Sound Card is Used, the Blue Light Flashes, Turn on the Bluetooth Headset or Bluetooth Speaker, Enter the Pairing State, the Bluetooth Transmitter Will Automatically Search for the Connection, and the Blue Light Will Stay on After the Connection is Successful. 2: For Use on a TV, Plug the USB into a 5V Powered UDB or Charger, Connect the Audio Cable to the TV's Audio Port, Set the TV to the Headphone Output, the Red Light Flashes, Turn on the Bluetooth Headset or Bluetooth Speaker, Enter the Pairing State, Bluetooth The Transmitter Will Automatically Search for the Connection, and the Blue Light Will Be on After the Connection is Successful. Specifications: Interface: 3.5mm Wireless Type: Bluetooth Content: AUDIO High Definition Support: None Sound Track: Double WIFI Standard: None Support AAC: No Model Number: TX3 Bluetooth Audio Transmitter Package Included: 1x Bluetooth 5.0 Audio Transmitter Adapter 1x 3.5mm Aux Cable 1x User Manual.