Product descriptionReceiver Mode:Change the traditional car stereo system or home audio system into BT-enabled ones. After paired, play music wirelessly from your BT-enabled smartphones, tablet PCs, etc.Transmitter Mode:Connected to the non-BT audio devices (such as MP3, MP4, TV, and PC, etc.), changing them into BT-enabled ones, and making it work with BT headset and speaker.Strong Compatibility:Comes with both 3.5mm and 2RCA audio port, this audio adapter can be used on your computer, laptop, home stereo system, headphone, smartphone, etc. (3.5mm to RCA cable is included.)Convenient to Use:Switch between transmitter and receiver modes with one button. It also supports U disk playback and power-off memory function.Specifications:Model Number: T-R22BT Version: 5.0+EDRProtocol Supported: A2DP, AVRCP (receiver mode only)Transmission Distance: 40m (open space)Interface: RCA, AUX, USBFrequency Response: 10Hz-20kHzSNR: !#!gt!*!90dBDistortion: !#!gt!*!0.02%Color: BlackMain Item Size: approx. 10.5*6.5*2.7cm/4.13*2.56*1.06inMain Item Weight: 77g/2.71ozPackage Size: 16.8*9.5*3.6cm/6.61*3.74*1.41inPackage Weight: 168g/5.92ozPackage List:1 * BT Audio Transmitter !#!amp!*! Receiver1 * 3.5mm to RCA Audio Cable1 * Type-C Charging Cable1 * User Manual (English/Chinese)