Turn one 12-Volt socket into a 4-way multi-purpose adapter for simultaneous charging and power. Use the two USB ports to charge phones and mobile devices quickly while powering and charging two 12V accessories at the same time. Charge your iPad while your passenger charges their cell phone. Compatible with iPad iPod MP3 cell phones and more. (Combined power usage of all four outlets must not exceed 10 Amps.) Enjoy some of the conveniences of home while you OTR or while camping or other off-grid situations. Whether you're a truck driver camper or simply in an off-grid situation this adapter can help you enjoy some of the conveniences of home. Its multi-purpose design compatibility with a range of devices and compact size make it an essential accessory for anyone who needs to stay connected while traveling or in off-grid situations.