We're a manufacturer for automatic voltage regulator (avr),these product is design to provide you with clean,stabilised power to protect your home and office appliances like personal computer (pc),scanner,fax machine of rinter from damages due to voltage frustration. the unit is equipped with a built-in surge protector & lightening arrestor ;It gives you even more and wider protection now. Lightening is the major killer to modem,with surge protector & lightening arrestor,the modem & other phone-line-devices could be saved from being damaged by the lightening. unstable power supply and lightening are the silent killer to the home and office appliances, so do not take the risk,protect them today.