DC input: 24V AC; Output: AC 220V/50Hz; Have a fully functional protective circuit: Short circuit, Overrating, Overload, overtemperature protection; Conversion efficiency up to 90%; Low interference technology; Soft start function; Same size, light weight, low noise, free maintenance; Features: High converting efficiency; Under voltage shutdown protection; Over voltage shutdown protection; Latest soft-start technique; Overload protection; Overheat protection; Alloy aluminium case; Usage method: 1. Place the power switches of the inverter and the AC device on the OFF position. 2. Connect properly to DC power source in compliance with the rating input voltage. 3. Plug the cord of the AC device in the output socket of the inverter. 4. Turning the switch of inverter on (the switch indicator gives light), then that of the AC device, this AC device can be used now as under the power supply. Warning: Please treat the outlet of the inverter with the same respect as that of any household power. Dont place any article on/over the inverter when operating. Keep the circulation of air around it. It gets so hot after working at a full load for a long time that it may hurt you if you touch it. Avoid the reach of children, avoid using it at a place that is wet, high temperature, flammable or explosive.