Advanced Protection: Built-in fuse & cooling fan, protection against short circuit, overload, overheat, low battery voltage and over battery voltage, BESTEK Car Power Inverter will auto-resume after protection triggered. Travel-sized and Lightweight Design: Compact size(16.5×8.2×4.0cm) for space saving, allows you to put your inverter anywhere you want, tight fit into the car DC socket. Upgraded cigarette lighter provides more firmly connection with the car lighter and easy to carry. 3-IN-1 Design: Combined AC outlets, cigarette lighter socket and USB charging ports (auto-match the max charging speed) into one compact, ideal for charging up to 6 devices simultaneously. BESTEK Advantage : UK's Leading Power Inverter Brand. Convert 12V DC from your car lighter socket to 230V AC outlet, 4.8A 4-Port and an additional 12V cigaratte lighter socket, ideal for use at campsites , road trips or anywhere dc to ac inverter is needed.