18W quick charge Dual USB Port - Smart Distribution 5V / 2.4A High quality circuit controller chip The Mi Car Charger Pro is a compact and stable charger that fits into most cigarette lighter sockets. The charger with 12 / 24V input voltage is compatible with models on the market. The Mi Car Charger Pro automotive quick-fill streamlined metal alloy casing consists of a single piece of copper complete with excellent heat dissipation. Built into the Mi Car Cgarger Pro, the control chip has 5 circuit protection, which not only improves charging efficiency, but also protects the car's electronics and charging device. The Xiaomi Mi Car Charger Pro provides one of the outputs for quick charging of Qualcomm QuickCharge compliant devices, eg. Xiaomi , Samsung , etc. devices. It is often essential in the car to get your rechargeable phone charged quickly on the road - no problem with the Car Charger Pro , it quickly recharges your smart devices.