High-Compatibility : Bluetooth V3.0+EDR technology.Compatible perfectly with your Bluetooth-enabled phone,laptop,tablet,MP3 player and many more, so that you can enjoy your stereo music through your car AUX audio system,home theater AV HiFi surrounding system.Easy Connection : Easy to operate.Connect your non-Bluetooth speaker/car audio system with this device through 3.5mm male to male audio connector/cable, and pair your bluetooth phone/Tablet with this device. Then,just play your phone music and enjoy your speaker stereo sound.Convenience : When your phone is default to use bluetooth Microphone, you can make hands-free calls through built-in MIC if someone calls you.Pr ess once to answer and press again to hung up.Auto-Disconnection : Charged by built-in rechargeable li-ion battery via mini USB port, and can be shut down automatically if it disconnects with the bluetooth device for 5 mins.Work continuously for more than 8 hours, and longer time in standby mode.Suit for Wired Headphones : Plug your normal headphones into 3.5mm aux jack and then pair this receiver with your phone via bluetooth, you could use your headphones to hear sound - Suitable for phones without 3.5mm audio jack.