Features: 1.Using Bluetooth-Compatible 5.0 chip design, compatibility and stability are stronger. 2.Three-in-one design of BT single receiving, BT single transmitting and FM transmitting. 3.Equipped with a high-definition LED digital display, the working status and BT mode are clearly visible. 4.Built-in digital to analog chip, support digital optical fiber, coaxial, AUX, RCA interface. 5.Support USB U disk, TF card playback and launch. 6.Support FM transmission, and the frequency can be adjusted from 87.5108. 7.Support 58 meters infrared remote control, all kinds of functions are readily available. 8.Built-in high-definition microphone, support wireless listening to songs, hands-free calling, and navigation. 9.The product connection is simple, without any cumbersome driving and downloading APP; Notice: Actual color may be slightly different from the image due to different display and light effect. Please allow 1-3cm deviation due to manual measurement. Bluetooth-Compatible version: V5.0 Supported protocols: AVRC, A2DP Working frequency band: 2.402GHz -2.480GHz Power class: Power class 2 Class II Sensitivity: -85dBmSignal-to-noise ratio: 90dB Distortion: 0.1 Interface type: as follows Input: 3.5mm, AUXRCAOpticalCoaxialUSBTF Output: 3.5mm, AUXRCA Screen size: 36*8MM Working current: Built-in battery: 3.7V/500mAh Charging current: about 400mA Charging time: about 2 hours Charging method: Micro USB 5V/0.5A Product size: 92*65*20mm Remote Control: battery included Package List: 1 set of Transmitter