SHOPZIE Car ChargerLCD Bluetooth Car Charger FM Kit MP3 Transmitter USB and TF Card Slot with in Built Mic for Handsfree Calling for All Android and iOS Devices - Colour May Vary This product is bluetooth car charger mp3 player for vehicle. Adapting professional-grade high-performance bluetooth Module, built-in mp3/wma decoder chip make it capable of playing the music flies in u disk, firing into the car stereo via wireless. Besides, during the bluetooth connecting ,play the phone's music and FM transmitter to Car Audio, perfect ,as calling incoming automatically switches to the speeaker's state, call end then automatically back the music player. So you do not do any modifications, easily enjoying the music and handsfree phone calls while you are driving. This item not only support Bluetooth Handsfree call but also music play. Rated operating voltage: 12V Working Voltage limits: 9-26V USB Output: 5V/2A Working Temp: 0-50¸ Support Play format: MP3 WMA SNR: >60db Distortion: <0.1% Frequency Response: 20Hz-15Khz Left and right channel separation: >60db BT Version: Version 2.1+EDR Bluetooth sound processing: A2DP(Advance Audio Distribution Profile) Bluetooth transmission distance: 10M Bluetooth microphone effective range: 0.5-2M FM transmission frequency: 87.5-108Mhz FM transmitter mode: Stereo digital PLL locking