The built-in smart IC chips and safe-fuse in the ports help protect your devices from over-current, over-voltage, over-heat and short-circuit. The case is made of flame retardant grade ABS material, which is Heat-resistance, chemically stable and safe. Easy to use: The back seat car charger has a 5ft long extension cable for the rear passengers to reach Easily. A removable clip can hang the backseat charger on the back of the front seat. 24W car charger, 5V 2.4A shared in the front, and 5V 2.4A shared for back seat two ports provides plenty of power to charge 4 devices simultaneously at their full speed. Partible with Samsung Galaxy Note9/Note8/S9/S9+ and more. Specification Port: 4 x USB Input: 12-24V Output: 5V/2.4A, DC 5V/2.4A(Max/Port),DC5V/4.8A(Toal) Output Power: 24W Input Voltage: DC 12-24V Material: ABS+PC Size(inch):1.1*1.1*2.4(Front Charger),2.0*1.0*0.1(Back Charger)

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