This unit contains a 5 volt USB output, modified sine wave and thermal shutdown. It also features reverse polarity protection, low voltage shutdown, low voltage alarm and external fuse. In addition, the CPI880 has 2 grounded AC receptacles, and direct- to battery cables with clips. CPI880 Features: Power Inverter, 800 W Continuous Power Handling, 5v USB Output, 2 Grounded AC Receptacles, Thermal Shutdown & Reverse Polarity Protection"