Fast in-car USB charging Plug in and play: simply insert the RMS22 Dual USB In-Car Charger to the 12V or 24V socket. Ideal for charging devices such as smart phones, tablets, MP3 players, cameras and sat navs. Features two 2.5A sockets with Smart Universal Fast Charging Technology, which enables the USB Charger to detect the device and charge it at an optimal rate. The USB socket also includes short circuit protection, over temperature protection, over load protection, over current protection, over input voltage protection and reverse polarity protection: all of which protect both your vehicle and your devices. Stylish design and optimal performance make this an excellent solution for in-car charging.