VicTsing Bluetooth Wireless FM Transmitter Hand-Free Car Kit Charger Bluetooth Version4.0. This Car Bluetooth FM transmitter is adopted Bluetooth Version4.0, fast pairing, low power consumption, high quality sound. With this FM transmitter, you can listen to music from your phone through the car stereo. Built-in microphone allows you answer calls through the car stereo, let you enjoy hand-free conversation while driving. Charge Two Devices Simultaneously. Two USB type A charging ports allows you charge your cell phone and tablet simultaneously. Stable performance,fast charging, no heat emission. One port can output 2.4A( MAX) electric current, more efficient. (Most FM transmitters only have one USB charging port in the market.) Exquisite Craftsmanship. Adopted high precision SMD crystal oscillator, this car FM transmitter has more stable performance and longer lifespan. LCD digital screen brings you better visual effect. Noise Cancellation Technology. This Bluetooth FM transmitter with hand-free function is designed with anti-interference processing. Some FM Transmitter with car charger function generates noise when charging. While our product does not, you can enjoy music or hand-free conversation through this gadget without generating annoyed electric current sound. Humanized Design. Built-in 3.5mm audio interface allows you play music from unsupported Bluetooth devices such as Mp3, Mp4, and other old type cell phones. Five function buttons are easy to press and responsive: play/pause music, previous/next track, answer/end/reject/redial calls, volume up/down, frequency up/down. Bring you perfect hand-free experience.