Description:This music receiver(hands-free) is designed to receive music from mobile phones or transmitters that feature Bluetooth wireless technology.The music receiver can be used with almost any audio receiver with an audio input jack，including automobiles.Listen to music from your smart phone or mp3 player on your existing home or car audio system.To enjoy car music，call solutions，the use of smart phones to make calls and listen to music through the car stereo.The product is embedded echo cancellation microphone.Using only one button，you can easily switch between music and phone.Note:If youto use the music receiver with another transmitter you must restart the pairing process with the new devices from step one.After pairing the new transmitter，the old transmitter will no longer be paired to the music receiver，you can have only one device connected at a time.If you had already matched beforePress and hold the on/off button for 3 seconds until the blue LED light begins flashing.To turn off， press and hold the on/off button for 5 seconds. The red LED will light up， and then turn off.Item Type: Bluetooth Car KitItem Size: 5.5 * 2.5 * 1.0cm / 2.17 * 0.98 * 0.39inSpecial Features: Car Receiver AdapterMaterial Type: plastic and metalItem Weight: 34 gColor: BlackUnit Type: piece