1. With AVR function 2. Protections against short-circuit, not enough voltage, overload and AC high and low voltage protection 3. With three step AVR, and four relays 4. Input voltage range: 145V---280VAC

5. Automatic shutdown(short circuit, low voltage in battery, overload)

6. Recharging display(battery recharging light distinguish when battery is fully charged)

7 smrt temperatur control fan to running, smrt control buzzle sound