NIMTEK NL4000 Pure Sine Wave Off-grid Inverter, Solar Inverter 4000 Watt 48 Volt DC To 110 Volt AC Expedited shipping from China(usually take 3 to 7 business days to arrive) Converts 48V DC to 110V AC of pure sine wave power. Ideal for running small electronic tools, air pumps, electronic doors, small motors, refrigerators, HDTVs, electronic game systems, computers, laptops and inkjet laser printers. Pure sine wave output waveform; Softstart function; Strong adaptability and stability ; Temperature-controlled fan, safe & efficient; With automatic over-current and output short circuit protection to avoid damaging the equipment; High transform efficiency, fast start; Safe and reliable with built-in fuse.