Multi-Functional Bluetooth Receiver, AGPtEK HiFi Bluetooth Car Kit Wireless Audio Music Adapter with Hand Free Calling Function, RCA Cable for Home Audio Music Streaming Sound System BlUETOOTH CONNECTIVITY:Upgrade your wired stereo/speaker/HIFI system with AGPtEK bluetooth SUPERIOR aptX SOUND PERFORMANCE: Bluetooth 4.0 and enhanced apt-X tech ensure stable signal and WIDE COMPATIBILITY FOR SPEAKERS: Plug the receiver into any A/V receiver, stereo system, or speaker SUPERIOR WIRELESS PERFORMANCE: With an amazing connection range of up to 30 feet, you can enjoy QUICK and EASY PLUG'N PLAY: freely listen to music through your speakers without wiring or docking