Smart contactless ac automatic voltage regulatorour company is an iso9001 and ce certified facility, with main customers like byd auto, hans laser, trumpf german, foxconn, etc.For the advantages of non-contact avr, please find the comparison between non-contact avr and brush type voltage regulator : 1) precision of voltage regulation is 1%, comparing 3% from carton brush type. More accurate & stable.2) it only take 20ms to regulate voltage, comparing 1000ms from carton brush type. Faster response & protection.3) no brush, no abrasion, no motor = no maintenance = save money & energy.4) with overload, shortload, short circuit, lack of phases and automatically bypass protection. No hazard.5) no power on compensation, no damage to equipment.