Bxst michael don protects against high and low voltage, brown -out, power back surges and voltage dips, these conditions are extremely harmful and damaging to equipment.By disconnecting the power when it is bad and recnnecting automatic on return of normal power, the automatic voltage gurad safeguards short term and long term damage to ensure longevity of your appliance.Reconnection takes place after a start-up delay to protect against frequent fluctuations. Instructions voltage rate:30a,23v wire connect full automatic .Current rating 30 amps. Weight 126g. Delay time 3mins or 5sec. Work voltage range 165-260v. Dimensions 13x8.5 x3.5cm. Under voltage protector 165v. Over voltage protector 260v. Setting button 1short press: delay time options 2 long press 5 seconds: show the rest warranty. Description of indicators 1 current v