Features: 1.High Quality Material: Charger socket is made of high quality aluminium alloy material, anti scratch, high temperature resistant, sturdy and durable. 2.Dustproof Cover: Dustproof and waterproof cover effectively prevent rainwater from entering, will not cause damage. 3.Multiple Protection: Car charger with overvoltage, undervoltage, over?current and short circuit protection, etc. Ensure charging safety. 4.Dual USB Port: You can charge two devices simultaneously, and one port is a fast charging port, more convenient and practical. 5.Digital Display Voltmeter: Red digital display voltmeter can real time monitoring voltage, let you know the health of battery while driving. Specification: Item Type: Car Charger Material: Aluminium alloy Color: Black Voltmeter Color: Red Monitoring Voltage Range: 6-30V Power: 36W Output Voltage: USB output 5V3.4A/9V2.5A /12V2A Installation Method: Punching installation Function: Has a variety of protection functions: input over voltage, under voltage protection; Output over current, over voltage, under voltage, short circuit protection; Reverse connection protection; High temperature protection inside the chip. Purpose: It can be used to power mobile phones, tablets, navigation and GPS and most of the vehicle supplies Application Range: It can be installed on DC 12V-24V cars, motorcycles, ATVs, SUVs, boats and other transport tools