Separate charging USB port, output current 2.1A, voltage 5V Please attention: better make the input DC10V-15V , otherwise, the monitor host will be easy to be burned. The red one is connected to the positive, the black one to the negative, and the two blue lines beside the antenna are not connected Features: 1. Added voice function to alarm sound. (Spanish, English, Chinese) Other languages are not available. 2. High alarm sensitivity. 3. The remote control distance is farther, and the open space is more than 50-100 meters. 4. The intelligent learning remote control can automatically identify different codes and store them automatically. Can be equipped with two remote controllers with different codes at the same time 5. Support reading TF card, U disk playing MP3 function 6. Hands-free calling 7. Bluetooth 5.0 connection playback function, Bluetooth playback distance is 10-20 meters. 8. Power-off memory playback function, start playing the last song/radio 9. Direct digital on-demand songs that you like to listen to and digital on-demand audio channels, eliminating the need for frequent up and down song selection. 10. Fully automatic search FM radio function 12. Dual USB socket independent charging port can charge mobile phone, 5V 2.1A output. 13. 3-inch original sound quality high-power output dual-channel 2*15W 14. Vibration and voice alarm function. 15. Working voltage: DC 12V 16. Bluetooth hands-free call and voice broadcast number Specifications: motorcycle bluetooth audio Model: MT-730 Color: red, black, blue Size: as shown Speakers: a pair Speaker size: 3inch Speaker output power: 2*15W 4 ohms Rated voltage: DC12V with display