Available up to 24,000 watts of protection.audlble alarm buzzer warns when mains falls optioal in some regions.simple to use simply plugs into mains no set up required.100% complete protection automatically disconnects the power when it's good. load switch allows switching the load no or off from the avs.5 leds constantly shows state of the mains supply.variable wait time fully user adjustable using dial control .microprocessor provides stabiiity and rellabiiity. provides complete protection for all electrical and electronics equipment against spikes brown-outs surges power cuts lighting under-voltage over-voltage power back surges.