Prosine inverter/chargers deliver clean true sine wave output power for all types of appliances along with three-stage charging (compatible with all battery types). Inverters include a full function remote control panel and built-in transfer switch. CSA/NRTL certified. All Prosine models CSA/NRTL listed to UL-1741, 458. AC output @ 120 Vac - 60Hz single phase. 2-year warranty.