This car MP3 player is equipped with professional and high-performance MP3 chip, which can transmit music files on your or to your car stereo wirelessly. Simple operation brings you instant music enjoyment. Just plug and play, turn your car FM , an empty frequency, and match it to this transmitter. Features - Color: Golden. - Material: ABS. - Size: Approx. 9.8 x 9 x 3 cm. - Input Voltage: 12-24V - USB output: 5V / 2.1A. - FM: 87.5MHZ-108.0MHZ - hands-free calling. Supports answer, up, reject, and other functions. Seamlessly between music playing and hands- . - . Stream music and calls directly from your mobile devices to car stereo system via . Just plug this into lighter socket of your car directly, plug and play. - and noise control ( ) technology ensures and clear call . - Support memory reading and playing music files on MP3/WMA format. - Support USB output, with 5V 2.1A charging ports, provide aster charging for mobile phones and tablets. Package list: 3 x