Description: Easy to operate: insert USB into the USB port of TV / computer, the LED light flashes quickly, and enter the Bluetooth search state. Turn on the Bluetooth headset / Bluetooth speaker to enter the pairing , and the product will automatically search the connection. USB power supply: connect the 3.5mm audio cable to the aux interface of the product and TV / computer / MP3 player, and the LED light will flash quickly to enter the Bluetooth search state. Turn on the Bluetooth headset / Bluetooth speaker to enter the pairing state Easily add Bluetooth to your car audio system, home stereo system, speakers, headphones with an auxiliary 3.5mm aux socket - a slim design with a minimum footprint of 3.5mm plug. Plug and play, simple setting, one key operation and clear indication. Bluetooth 5.2 connection: no audio delay, noise reduction, improved speed and range, dual audio and backward compatibility Cvc8.0 noise reduction and DSP technology can eliminate echo and block invasive background noise, creating lossless audio CD quality music Using the transmitter (TX) profile via the 3.5mm audio jack dresi allows your TV / projector to easily enable Bluetooth. Specification: Product name: USB wireless audio transmitter Bluetooth version: 5.2+EDR Input port: USB / AUX Transmission distance:> 15 meters Frequency range: 2.402GHZ-2.480GHZ Supported protocols: SBC, A2DP, AVRCP Device power: USB 5V Size: 12 x 7cm Package Includes: 1 Piece USB Bluetooth transmitter 1 Piece 3.5mm audio cable 1 Piece 2DB antenna 1 Piece Manual