1)Completely controlled by CPU increased the high stability of the inverter.; 2)With humanized design, when the AC cut off, the unit will start to supply power automactically , when the AC comes back, it will take powers from AC and turn to recharge the batteries automatically. 3)With all sides protections, protections against output short-circuit, overload protection (when it overload, it will close the unit automatically, when you reduce the load, then it will return to work automatically), low-voltage input protection, over-voltage input protection. 4)With charger built-in. 5)output waveform is pure sine wave: 220V/230/240VAC+/-3%, 50HZ+/-2%.(Can be 120VAC, 60HZ, optional). 6)it can drive inductive loads, such as tube-lights, TV sets, air-conditioner, fans, refrigerators, computers,motors, wind generator, solar system ,gasline generator and so on. 7)with high transfer efficiency, we can make our inverter transfer efficiency up to 85%---90%. 8)with communication port: RS232, SNMP card for option. 9)With LCD display or LED display for option. 320 * 130 *190mm, 12KG.