There are multiple protection functions: input over-voltage, under-voltage protection output over-current, over-voltage, under-voltage, and short-circuit protection reverse connection protection chip internal high-temperature protection. USB 1 outputs 5V 2.4A and supports DCP BC1.2 or Apple Divider3 or Samsung 1.2V fast charging protocols. And can be fully compatible with various tablet computers. USB 2 output voltage has three output schemes: 5V3.4A or 9V2.5A or 12V2A. The content of the agreement includes 2. Fast charging port: DCP BC1.2, Apple Divider3 or Samsung 1.2V. Aluminum alloy, ABS resistant to high and low temperature, flame retardant and environmentally friendly materials, with a very high safety factorDigital display voltmeter, battery status is clear at a glance The product is distributed with fixed pieces, terminals, screws, and the installation is more convenient and beautiful. The power taker can be used to supply power to the external equipment of the car, and can also be used for charging mobile phones, tablets, GPS, etc. Package Includes: 1x 12v Outlet Socket 4x Screws Specifications: Material:Aluminum Alloy and ABS Material Size:Approx.17x9.2x5cm or 6.69x3.62x1.96in Color:Black Input Voltage: DC 12V Normal Output: 5V or 2.4A Quick Charge Output: 5V or 3.4A 9V or 2.5A 12V or 2A USB Number: One is ordinary USB and the other is QC 3.0 fast charge Product Use: USB can be used to power mobile phones, tablets, IPAD, GPS and other vehicle-mounted products. Scope of Use: It can be installed on cars, motorcycles, ATVs, RVs, SUVs, boats, yachts, and other transportation tools. 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.