Specification Material Type : ABS Item Type : FM Transmitters Voltage : 12-24V Special Features : Hsfree Support Car Voltage display : Reminder Voltage low Support Hsfree Call : Bluetooth Hsfree Build in microphone : Hs free talking Car Kit Bluetooth FM Transmitter : Transmissor FM Bluetooth Description 1 Precise structural design 2 USB3 1A charger, Bluetooth version 5 0 3 Support charge while listening to songs 4 Support power memory function 5 The screen can show the frequency 6 Support Bluetooth/TF card/U disk player, Bluetooth hs-free calling 7 This product adopts FM full-frequency wireless transmission technology can directly read the audio files in the mobile phone Bluetooth/TF card/U disk 8 Supports Bluetooth audio playback Bluetooth hs-free calling 9 Support intelligent APP function, lossless high-quality audio decoding; usb car charging function in a multifunctional car MP3 10 Noise cancellation function, built-in noise cancellation circuit, make the call sound clearer How to use? 1 Insert the cigarette lighter socket Insert the car bluetooth MP3 charger into the cigarette lighter the voltage will be displayed on the screen for 2 seconds, then the bluetooth mode can be entered At this time, the default frequency is 87 5MHz 2 Connect your phone to Bluetooth Turn on the Bluetooth of your mobile phone search for the car Bluetooth device "Car Bluetooth" to connect 3 Adjust the car FM frequency to be consistent with Bluetooth Turn on the car radio, manual or automatic search function, lock the frequency to the same frequency as the car MP3 "FM87 5MHz" 4 Play music on your phone Open the music player on the phone play music You can use the car stereo to listen to the music playing