Features: 1.Dual USB output with 5V/3.4A, 9V/2A, 12V/1.5A three output solutions, can charge most car accessories quickly. 2.With a color screen voltmeter, which can detect the use of the car battery at any time to prevent safety accidents caused by defective batteries. 3.Adopts ABS flame resistant material, environmentally friendly, and has very high safety factor, with terminals, convenient and simple to install. 4.Features multiple protection functions, input overvoltage, undervoltage protection; output overcurrent, overvoltage, protection, etc. safe to use. 5.Wide application, can be installed on car, motorcycle, atv, rv, suv, boat, yacht and other conveyance. Specification: Item Type: Car Charger Material: ABS Flame retardant and environmentally friendly material Shell Color: Black Shell Input Voltage: DC12V Fast Charge Output: 5V/3.4A, 9V/2A, 12V/1.5A Voltage Test Range: 11-14V Purpose: Dual USB Can be Used to Power most Car-Mounted products such as Mobile Phones, Tablets, Navigation and GPS; The Color Screen Voltmeter Can be Used to Detect the Voltage Usage of the Car Application: Can be installed on Car, Motorcycle, ATV, RV, SUV, Boat, Yacht, and Other transportation tools Protection Functions: Input overvoltage, undervoltage protection; output overcurrent, overvoltage, undervoltage, and short circuit protection; reverse connection protection; chip internal high temperature protection. Wiring: "+" connects battery positive, "-" connect the battery negative