Wireless In-Car Bluetooth FM Transmitter Radio Adapter Car Kit with 3.4A Dual USB Charging Output, TF Card / USB Playback Support and Hands Free Calling

How To Use? – Plug the FM transmitter into your car cigarette lighter socket for power. – Turn your radio to an unused FM frequency, then match this fm transmitter to the same frequency. FM channels 87.5 MHz – 108.0 MHz, 0.1MHz/step. – Insert a Micro SD card/USB Flash Driver or pair this Bluetooth FM transmitter with your digital device to enjoy music playback or hands-free conversation.User Tips:1.It is normal that FM Channels will have some noise because of the interference of the local radio signal.Find a vacant or non-interfered frequency and sync the device to that frequency for minimized static noise.2.To achieve best audio quality,please set the volume on your phone or the device to maximum and then adjust the volume for your car stereo; we do not suggest adjusting the volume of your car speaker to maximum (this will bring a lot of noise).3.We suggest that you use a memory card less than 32GB. Memory cards larger than 32GB may cause abnormal reading.4.We recommend that you do not use the product in car/truck that modified the battery.This may cause device failure because of instantaneous high current.5.To protect this device,we recommend that it be removed from cigarette outlet after use to avoid instant high start voltage damaging the device