... start key to easy start working when the voltage show is normal.5.voltage range:90+/-3%~130+/-3%(60HZ); 180+/-3 ... , LCD display to show the working voltage and state.9.5 Types of protection (over voltage, under voltage, interruption, surge/spike, over load protectionPackage ... the circuit to protect the household appliance.3. When the voltage come back to the normal, the protector will continue to ...