Vtin Bluetooth Receiver Wireless music. Turn your wired headphones, speakers, home stereo systems, car audio systems into Bluetooth-enabled devices. Freedom to enjoy wireless music. Bluetooth V4.0 Tech. With CSR4.0 technology, VTIN Grid Bluetooth receiver offers you 30 feet operation range with good performance. Supporting connect two Bluetooth-enabled devices simultaneously. Hands-free calls. Built-in Mic allows you to make hands-free calls easily while driving. Just press the MFB button to pick up/end a call. A2DP&AVRCP profiles provide you high quality sound. Extra-long Battery Life. 8 hours working time and only need 1.5 hours to charge it fully. Change the volume, skip tracks, play/pause music easily through the receiver. Easy to Use. Just plug the VTIN Grid Bluetooth receiver into your wired headset or stereo system with 3.5mm audio connector and then pair with your Bluetooth-enabled devices. light and portable (thickness: 8mm).