The SW series of inverter/chargers features pure sine wave output and multistage charging as required by sensitive and sophisticated electronics such as plasma TVs, computers, entertainment systems, microwaves, and all other common AC-powered electronics. Xantrex Freedom SW inverter/charger includes built-in transfer switch, power factor corrected multistage charger, overload protection, battery temperature sensor, and adjustable low battery voltage cutoff. Operating range: -4°F - 140°F. 3,000 watts continuous power. 7-3/4" x 13-1/2" x 15-1/4".