Bluetooth Receiver/Car Kit,Bluetooth Car Adapter(3.5mm AUX Output) Hands-Free Car Kit Wireless Adapter&Bluetooth AUX Adapter BLUETOOTH 4.1 RECEIVER: Built with Bluetooth 4.1/HFP/HSP/A2DP/AVRCP to smart your life that you can enjoy music and hands-free calling from your smartphone in premium-quality sound. Up to 33ft connection range s low signal delay. Double links & wide COMPATIBILITY: VIEWTEK portable Bluetooth receiver can connect two Bluetooth devices at the same time. And it also could compatible with most smartphones and Bluetooth electronics, ideal for home or vehicle audio systems and wired headphones (connected with VIEWTEK via 3.5mm Audio cable/adapter then pair your phone With VIEWTEK to achieve listening music or answering call).