Fangrui Product Details [two In One Bluetooth Transmitter And Receiver:] 3.5mm Tv Bluetooth Transmitter Supports Bluetooth Transmission And Reception, Namely Tx And Rx Modes. Rx Mode Supports The Simultaneous Use Of Two Devices, Such As Car Stereo And Home Stereo, While Tx Mode Supports The Simultaneous Operation Of One Device, Such As A Tv Or Pc. [bluetooth 5.3- Farther And Faster: ]this Wireless 5.3 Usb Bluetooth Adapter Provides A Stable Connection Of 10 Meters , Providing Clear, Practical, And Enjoyable Sound (note: Phone Calls Are Only Supported In Rx Mode, Not In Tx Mode). [wide Compatibility: ]this 3.5mm Car Bluetooth Usb Adapter Is Compatible With Devices With 3.5mm And Usb A Interfaces. The Rx Mode Can Be Used For Car Stereo, Home Stereo, Audio Music Streaming Sound Systems, Amplifiers, Speakers, Headphones, While The Tx Mode Can Be Used For , Pcs, Desktops, Mp3, Mp4, Switches, And More. [plug And Play: ]a 2-in-1 Bluetooth Usb Adapter Suitable For Cars Does Not Require The Installation Of Drivers For Any Compatible Dev