1、Manufactured with anti-flame retardant nylon material. Black shell, blue light, and fine workmanship, make the whole product look stylish and beautiful. 2、The input voltage of the product is 12-24V. Suitable for all boats and car of 12-24V, with very wide scope of use. 3、Comes with a voltmeter, can detect the use condition of the car battery at any time. It will prevent the safety accident caused by defective batteries. 4、With an ammeter, used to detect the output current of the USB port at any time. 5、Accompanied of 2.4A USB, which can be used for power supply of mobile phones, tablets, GPS, etc. 6、With waterproof and dustproof function, can protect the internal circuit and prolong its service life effectively. 7、Can be installed in large-scale walking tools such as motorcycles, car, ships, yachts, motor homes, buses, etc. 8、Temperature control chip for long charge, can control the circuit to prevent excessive temperature. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia