Description: It's easy to use, plug the transmitter into your phone or other device, and set the transmitter to the same channel as the car radio. With a launch distance of 15 meters, it is the most powerful transmitter. Specifications: Charging: 5V 1A (4.75V 5.5V 1A 10%) AUX connection: 3.5mm audio connector FM display: 88.1Hz 107.9Hz FM connection: the same frequency is connected Audio input: 3.5mm audio connector Volume adjustment: none Switch: ON OFF switch Audio output: FM band connection output Frequency adjustment: press ">" to increase the frequency " " to decrease the frequency Output voltage: 5 0.1 Vehicle current: 600mA Storage temperature: 20 C ~ +50 C Working temperature: 10 C ~ +40 C Stereo resolution: 38dB Package List: 1 * User Manual 1 * Charging Cable 1 * Transmitter Note: The hands free function is not based on the microphone of this transmitter. The transmitter itself does not have a microphone. Plug this transmitter into the phone and use the phone's microphone to