[Non-Slip Button Switch]On the basis of the traditional best-selling metal models, it has been upgraded, adding a well-designed non-slip button switch, more stable on control than Contact button. The switch can control the LED digital display to avoid the battery drained due to the constant light after the engine starts, and effectively enhance its lifespan. [All Metal Material Body]The car charger is made of advanced aluminum alloy material, which is sturdier than traditional plastic models, with better texture and better high temperature resistance, so it is than plastic chargers. [Efficient Quick Charging]Dual ports pump out 36W total. Power Two Devices at Full Speed with QC 3.0 Charging Technology, Up to 4x Faster than Conventional Charging, and Deliver the Fastest Possible Charge to All non-quick Charge Device. [Red Digital Display]The digital voltmeter monitors the battery and electrical system automatically and indicating the car voltage in the screen, and convenient to know the health of battery while driving. The voltage can still be seen after the dust-proof sealing cover is closed. Waterproof & Dustproof Design with USB cap against sudden water splashes and dustproof, protects internal circuit, effectively enhance its lifespan. The current voltage number can also be displayed when the protective cap closed. Suitable Size advantage from the compact construction, that's smaller than most USB chargers on the market after installation. Built-in 10A Fuse 10A fuse for overload protection, let this USB charger be with you safety. More Service High-speed charging & Advanced technology, change the way you charge. Specifications: Output Ports: 2 X QC 3.0 Max Output: 36W (18W each) Output Voltage: DC 3.6-6.5V/3A, 6.5V-9V/2A, 9V-12V/1.5A Input Voltage: DC 12V-24V Working Temperature: -40℃ to +60℃ Product Dimension: 1.4 x 2.1 inches Colour: black<b