1.Support FM full frequency transmitting function 87.5-108.0MHZ2.Support dot screen display 1.3 inch3.Support U disk playback function4.Support TF card playback function5.Bluetooth , hang up, refuse to , redial calls and other functionsRated working voltage:12V-24VLimited working voltage:8-27VUSB output:Dual USB output 5V/3.1AOperating temperature:0-50 degreesCharge recognition:USB2 support 5V/2.1AVoltage detection accuracy:+_1VSignal-to-noise ratio: 60dBDistortion:Less than0.1%Frequency Response:20Hz-15KhzLeft and right channel separation: 60dBBluetooth version:Version4.0+Bluetooth sound processing:A2DP (Advance Audio Distribution ) functionBluetooth transmission distance:Less than 10MEffective Bluetooth microphone range:0.5-2MFM Transmitting Frequency:87.5-108.0MHZTransmit FM Mode:Stereo Digital PLL Frequency LockSupport Bluetooth stereo music playback cancellation and noise suppression () technology when talkingSupport dual USB output voltage, power supply to other devices, output a of 5V/3.1AAutomatic power-off memory functionSupport charging recognitionSupport MP3/WMA music playbackSupport multi-language Support display adjustmentSupport electric frequency voltage detectionDisplay:LCDColour:BlackMaterial:PC+ABSPackage Contents:1 * main unit +3.5mm audio connection cableOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.