Run or charge AC powered electronics in your vehicle"s DC outlet using this power inverter. Features 2 grounded AC outlets which provide 150 Watts of continuous power and 300 Watts peak surge power. Also features a 5 Volt 2.1A USB power port so it is powerful enough to charge high powered USB devices such as iPad/tablets and Kindle/e-readers. Other compatible electronics include laptop computers, cell phones, MP3 players, digital cameras, portable games, etc. Safety features include overload protection, auto-reset short circuit protection, and low battery shutdown. The built-in surge protection allows for safe car start up and shut down. This inverter has features that will prevent your battery from being completely discharged. An audible alarm will sound when the battery voltage is 10.5 Volts. If you hear this alarm we recommend operating your engine for 10-20 minutes to recharge the vehicle"s battery. The DC plug fits all standard vehicle 12 Volt sockets. Can also be used in RVs and boats in addition to vehicles. The inverter can operate with the engine turned off. With the surge of USB devices that require more and more power, Wagan has upgraded the inverters with USB 2.1 ampere power ports. You can call this feature: USB+. With the increasing amount of electronic gadgets we use everyday, it"s important that you have what it takes for those power hungry devices to stay on top of their performance, especially when you are on the move. With USB+, users now have enough power to charge their USB-powered electronics such as iPad, iPhone, Kindle, Nook, and other e-readers, tablets, smartphones, and hand held game consoles. Wagan aims to expand the line of products equipped with USB+ in order to provide you with the power charging when you need it, where you need it.