Soft start technology Rated power: 4000W Max power: 4400W Surge power: 8000W Output waveform: Modified sine wave Efficiency (full load): 85% Input Voltage: DC12V or DC24V No Load current: < 1Amp Output voltage/frequency: 110-120Vac 60Hz or 220-240Vac 50Hz With DC5V 2A USB and LCD wire ON/OFF remote (Optional) Protections: (Overload, low voltage, over voltage, output short, over temperature shut off) With dual thermal controlled cooling Fans (High speed) Output AC receptacles: 2 X IP54 waterproof sockets. Operation temperature: -20ºC to 40ºC Net weight:7KGS Production dimension: *25.5*10.5CM