Bluetooth Car Kit with Built-in Microphone, 2.1A USB Charger, Air Vent Clip ReceiverBluetooth Car Kit Bluetooth Receiver, Bluetooth Hands-Free Audio Adapter Built-in Microphone Air Vent Clip, 2.1A USB Car Charger 1. Easy and simple to upgrade your car stereo Bluetooth hands-free wireless audio!2. Play your smartphone, iPad, iPod, and other devices with Bluetooth products to music on, you can make your way through the wireless from your car stereo to play back synchronized to music on your smart device!3. You can in the car within the scope of smart devices cozy browse your music on the list to select their own favorite music play / pause; previous song; next song, music selection, hands-free calls, etc.4. Up to 90dB SNR and low audio distortion of 0.05%, fully satisfy your demand for high quality audio!5. Support Bluetooth hands-free function, you can listen to music while the bobble any phone!