Bluetooth 4.1 AUX Receiver with Microphone - Battery-Free 3.5mm Adapter for Car & Home Audio

4.1 : Built with Bluetooth 4.1 A2DP AVRCP，Makes your Car Home speakers Bluetooth for streaming music from your smartphone tablet or other Bluetooth device Built in Microphone: Take calls directly via your U2 bluetooth Receiver, safe and convenient，to smart your life that you can enjoy music and hands-free calling from your smartphone in premium-quality sound. : Just turn on the Bluetooth of your cell phone first and then turn on the Bluetooth receiver, the Bluetooth Receiver can be automatically paired. PLAY, NO REQUIRED： USB Port connect this Bluetooth receiver directly to the USB power source, you can connect it with any usb charger, aux for Audio Port. Small and Thin with Aluminum Housing, there is a young man-love audio and video electronic very much-his dream is very simple that is to enjoy music at any time freely. CODE: