Nature Power 38304 Pure Sine Wave Inverter, 400-watt Provides 400-Watt of continuous power and 800W surge capacity Filtered sine wave output helps eliminates distortion for sensitive electronics 2 AC outlets, 1 5-Volt USB port and On/Off switch Automatic shutoff protects against overload, short-circuit and high and low temperature battery condition Certified to be compliant with safety standards and are ETL listed