Mpow VicTsing Bluetooth Wireless Voice Navigation Car Radio FM Transmitter Adapter Kit with Hands-free Calling and Music Player Support Colour:Black   Featuring easy button control and clear LED screen, VicTsing Bluetooth FM transmitter is your versatile in-car companion that brings you wonderful music, delivers clear phone calls and rapidly charges your smart device! Easy to Read for Undistracted Driving The LED screen clearly displays volume, car voltage and FM frequency. Compact design promotes stability and safety without blocking gear stick while driving. Experience the optimized viewing comfort while you drive. Handy Button Control Quick to answer, hang up, refuse, cancel a call via the middle multifunctional button. “CH” Button enables you to switch to a private call to meet your demand. Easy to use 1. Simply plug the product into car cigarette socket, turn your car FM radio on, find the empty radio stations(not the local radio station) , then adjust the bluetooth FM transmitter frequency to be the same frequency as that of the car radio. 2. How to adjust bluetooth radio transmitter frequency: Short press the CH button and short press the forward or backward button to increase or decrease the frequency gradually. Long press to adjust the frequency quickly. Specifications: Bluetooth Version: V4.2 Working Voltage: DC12V ~24V FM Frequency: 87.5MHz-108.0MHz Compatible Audio Format: MP3/WMA/WAV/AAC/FLAC Compatible Bluetooth Protocol: A2DP/AVRCP/HSP/HFP Compatible Music Format: MP3/WMA/FLCA/APE/WAV Compatibility for U Disk: ≤32GB Package: FM Transmitter ×1 Audio Cable ×1 User Manual ×1