This product has a hands-free phone, FM Transmitter Car Charger Car MP3 recognizer. It used a professional high performance module, built-in MP3/WMA decoder chip, USB disk or TF music files wirelessly to the car stereo. And, as long as your phone is equipped with , your phone will be able to send music Hitting your car stereo, hands-free calls can be switched to answer, up, reject, redial calls and other functions, at the end of the call, it will automatically switch to the music player. Features - Color: Black - Material: ABS - Size: 10x8x2.5cm / 3.9x3x1inch(LxWxH) - Full frequency fm transmitter - Supports 3.5mm audio input - Supports U disk TF player - Supports mp3, WMA format music - answer, up, reject, redial calls and other functions - stereo music play - Echo cancellation and noise supports (CVC) technolony a call - Supports USB output voltage, the maximum output 5V/2.5ARated -Operating voltage: 12V - Working Voltage limits: 9-26V - USB Output: 5V/2A - Working Temp: 0-50 - Support Play format: MP3 WMA - SNR: gt;60db - Distortion: lt;0.1% - Frequency Response: 20Hz-15Khz - Left and right channel separation: gt;60db - BT Version: Version 2.1+EDR - sound processing: A2DP(Advance Audio Distribution Profile) - transmission distance: 10M - microphone effective range: 0.5-2M - FM transmission frequency: 87.5-108Mhz - FM transmitter mode: Stereo digital PLL locking - Avoid danger, one click to answer, up, reject, redial calls and other functions, hands free with Wireless Receiver, FM Transmitter, USB Charger, Car MP3 recognizer. - Convenient to charge any time, supports to charge phones, tablets like iPhone, iPod, iPad, phones and other mobile devices. - Enjoy music, full frequency FM transmitter, digital display, easily select the channel. - High performance stereo music play, avoid any noise, supports audio input like mp3, wma from USB disk, TF card. - LCD digital display the status and automatic power-off memory saving function.