Description: Transmitter: In transmitter mode, the adaptor can transmit audio from a non-Bluetooth TV, home stereo system or CD player to a wireless headset or speaker. Receiver: In receiver mode, the adaptor will transmit the audio from a Bluetooth-compatible mobile phone, tablet or computer to a wired stereo, speaker or headset. Multi Function: The adaptor is equipped with 5.0 function to provide a sensitive and stable connection without any delay. And the microphone for you can have hands-free calling white working, cleaning or driving. Easy to Use: No need of charging or battery, the adaptor is powered directly from the device, simply plug in the interface, you will no longer need to worry about sudden outage. Wide Application: It comes with a 3.5mm audio interface, universally suitable for computer, laptop, home stereo system, headset, smartphone, MP3 player, CD player, etc. Specification: Material ABS. Color: Black. Version: 5.0. Input Voltage: DC 5V. Transmission Rate: 100Mbps. Working Frequency: 2.4MHz. Effective for Radius: 10m/393inch/32.8ft. Size: Approx. 4.5x2x1.1cm/1.77x0.79x0.43inch. Note: There might be a few color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. Package Includes: 1 Piece Audio Transmitter Receiver.