1. [Wireless Audio Stream] The Bluetooth receiver allows you to wirelessly stream audio from your Bluetooth-enabled devices to your existing wired stereo, speakers or headphones. Ideal for car or home speakers. You can also enjoy high-fidelity stereo audio through headphones. 2. [Hands-Free Calling] The built-in microphone makes talking to family and friends a breeze. Perfect for hands-free calls while driving. Just plug in your earbuds once the bluetooth receiver car kit syncs with a device, blown away as it turns into hands-free bluetooth headphones. 3. [Rechargeable Easy Control] This portable bluetooth 4.2 receiver car kits can be charged while working. And you can easily control the listening experience by simply increasing/decreasing the volume, playing and pausing music, or answering calls without using the smartphone. 4. [Auto reconnection and long distance calls] Your last paired Bluetooth Device automatically connected in pairing mode. Equipped with the latest Bluetooth technology for a strong, stable connection up to 40ft in open space with no obstacles. 5. [Compact and Wide Compatibility] The mini Bluetooth audio receiver is space-saving and convenient for using with a variety of devices designed. Equipped with Bluetooth 4.2 technology, this Bluetooth audio adapter is compatible with most smartphones and is ideal for home or vehicle audio systems. Please do not try to pair it with Bluetooth headphones or Bluetooth speakers, as the gadget acts as a Bluetooth receiver instead of a Bluetooth transmitter.