Built-in digital display for DC volts and output power. Built-in USB port. Dual GFCI AC receptacles for safe operation. Heavy duty terminals for trouble free battery connection. Available ON/OFF remote switch (with ignition lockout). Two year warranty. Low voltage shutdown & alarm. Over voltage protection. Overload & over temperature shutdown. GFCI protection. Pure sine wave inverter at a modified sine wave priceDual GFCI AC receptacles and USB charge portHardwire capable through optional external transfer switch (808-0915)Meets UL458,CSA and FCC Class A standards