AIMS Power 600 Watt 12 VDC Pure Sine Car Power Inverter with Cables USB Port 600W continuous pure sine power Dual ac receptacle with additional USB port 28" Alligator clips included. Full load efficiency: 85%, 1/3 load efficiency: &gt;90%, no load minimum operating temperature: 32 degrees F, full load maximum operating temperature: 104 degrees F (automatic shutdown), no load power consumption: &lt; .6 dc amps Low battery voltage warning/shutdown High input voltage protection with automatic shutdown