About this item Easy to Pair and Reconnect: Airfrex AIU2 Bluetooth receiver applies the latest CSR Bluetooth chipset, which ensures a wider compatibility on any Bluetooth devices with instant pairing and connection, paring is done in seconds and audio transmission is in lossless format. This portable Bluetooth stereo receiver is also a Bluetooth headphone adapter when you plug it into your headphone, turning the wired headphone into a Bluetooth headphone Dedicated Headphone Amplifier: AIU2 car Bluetooth adapter uses a dedicated TI headphone amplifier chip which offers an unparallel wireless sound quality, making this Bluetooth aux adapter powerful in bass, smooth and rich in vocal and crystal clear in pitch. There is no sound quality compromise even this aux Bluetooth adapter is used in wireless & streaming audio systems Built in high sensitivity Microphone: This Bluetooth audio adapter is equipped with a high sensitivity microphone which makes hands-free phone call available, when there is a Phone call coming in, all you need to do is click the button. It is a perfect aux Bluetooth adapter for car Long Range with Stable Signal and True Sound: Our 3.5mm Bluetooth adapter boasts high-quality wireless connection, there is no breaking up within 33 feet range, no hiss or pitch noise at all. Bass Boost Option: This Bluetooth car adapter offers an option of bass enhancement; you can always activate this extra feature by double clicking the button if you enjoy deep bass, same way, you can cancel this feature by double pressing the button