Features: 1.With lightweight and compact shape, easy to carry, and plug and play, easy to use, no need to install a driver 2.Having two functions of transmitting and receiving at the same time, and can be switched freely to meet your needs 3.Using BT 5.0 high?performance chip, the wireless connection rate is improved, the stability is improved 4.With wide compatibility, the USB is widely used in your computer, laptop, home stereo system, smart phone, Mp3 player, CD player, etc. through 3.5mm/0.13in cable 5.Can be connected to BT keyboard, mouse, gamepad, enjoy wireless and flexible operation, work more efficiently, and play games more freely specification:Item Type: BT USB Material: ABS BT Version: BT5.0 Technology: AVRCP (Receiver Mode Only), A2DP Signal Transmission Distance: 10 Meters/10.9yd Pairing Name (Receiving Method): KN320 Mode Switching: Click The Button Transmitter Mode: Wirelessly Transmit Audio From a Non-BT TV, Home Stereo System or CD Player to a BT Headset or Speaker (Red Led Light Is on) Receiver Mode: Wirelessly Transmit Audio from a BT-enabled Mobile Phone, Tablet or Computer to a Wired Stereo, Speaker or Headset (Blue Led Light Is on) PackageList: 1 xBT USB 1 x 3.5mm Audio Cable 1 x User Manual