Vodool Digital Wireless Bluetooth Fm Transmitter, In-Car Bluetooth Receiver with Handsfree Calling Function , Bluetooth Adapter Car Kit for Car Stereo with Dual USB Port (MODE 2) Hands Free Calling:---- simply pair this car transmitter with your phone. You will be able to answer/reject/end calls easily. Hands free function let you have safer driving. Music Player and FM Transmitter:---- this car radio adapter is able to play music. It supports music format such as MP3, WMA, WAV and FLV. it is also able to play and transmit music files from USB disk. Fast and Intelligent Charger: ---this FM car charger comes with due USB output 5V/2.5A ,It will automatically provide the matching output according to the situation. Great compatibility:--- It is compatible with nearly all bluetooth-enabled devices, such as iPhone, Ipad, Samsung, LG, HTC smartphones, tablets, etc. Noise Reduction Technology: ---With CVC technology, this car FM transmitter provides you with clear phone calling and let you enjoy beautiful music. It also supports A2DP (Advanced Audio Distribution Profile).