Analytic Systems AC Intelligent Pure Sine Wave Inverter 20-40V In 110V Out One Size. Using the free to download Power Wizard software the user can select output frequency output voltage output frequency and low voltage shutdown parameters from any laptop through the standard micro-usb interface. Safety features include current limiting short circuit protection inrush protection (during connection to the DC source) overtemperature de-rating and shutdown and low input voltage warning and shutdown. An Off-Line UPS options allows external AC to be routed through the inverter for high power UPS function if the external AC fails.Features:Programmable Low Voltage ShutdownOverload ProtectedShort Circuit ProtectedDSP ControlledProgrammable FrequencyOver Temperature ProtectedHardwire AC Output ConnectionProgrammable Output VoltageThree year parts and labor warranty Package Contents: Analytic Systems AC Intelligent Pure Sine Wave Inverter Analytic Systems IPSI1200-20-110: AC Intelligent Pure Sine Wave Inverter 1200W 20-40V In 110V Out One Size