Bxst michael 30amps automatic voltage gurad 100%quality guarantee . Bxst michael don protects against high and low voltage, brown-out power back surges and voltage dips, these conditions are extremely harmful and damage to electrical and electronic the power when it is bad and reconnecting automatically on return of normal power ,the automatic voltage guard safeguards and protects against short term and long term damage to ensure longevity of your appliance. Reconnction take place after a star-up delay to protect against frquent fluctuations, instructions 1voltage rate:30, 230v 2wire connect. 3full automatic.Cunnent rating 30amp.Weight 126g.Delay time 3mins or 5sec.Work voltage capability 6600w. Work voltage range 185-265v dimensions 13x8.5x3.5cm. Under voltage protector 185v over voltage protector 265v automatically disconnects the power when it is bad and reconnects after 3 minutes when it is good.