The Wagan Smart Inverter AC 400 with USB is an essential item for anyone who needs to power their tablet computer, e-reader, any other electronic item on the go. The Wagan Inverter can also charge your laptop, cell phone, MP3 player, digital camera, portable game player, and more. The two grounded AC outlets in the Wagan Inverter provide 400 watts of continuous power and 1,000 watts of peak surge power. The Wagan Smart Inverter AC 400 with USB also has 2 USB ports for extreme efficiency. This USB inverter has several safety features such as overload protection, auto-reset short circuit protection and low battery shutdown. You can charge your important devices at any time with the Wagan Inverter — it can even operate when your vehicle engine is turned off. This Wagan Smart Inverter AC 400 with USB fits all 12V sockets. Alligator clips are included. Wagan Smart AC 400 USB Inverter with 5V 2.1A USB: * 2 USB ports * Powers and charges your electronics, up to 400W, on the go * Power and charge other electronics such as cell phones, MP3 players, digital cameras, laptops and portable game players * Provides 400W of continuous power and 1000W peak surge power * Auto reset short circuit protection * Overload protection and low battery shutdown * Built-in surge protection for car start up and shutdown * Can operate with the vehicle engine turned off * Fits all standard vehicle 12V sockets * Includes alligator clips