This product is a delay-type high accuracy household voltage stabilizer.Good for voltage regulation in wide range.It features small dimension light weight, small distortion of output wave form, quick reaction.Ideal power source for modern household electricity applicances. ---Input voltag: AC 140~250v 50Hz/60Hz ---With 3sec/3min delay function ---Output voltage:AC 220v±8% ---With low/over-voltage protection ---certification: CE ---product list: AVR-500W------68.5*31*22cm---4pcs/ctn---19/17kgs AVR-1000W------68.5*32.5*22cm---4pcs/ctn---21.5/19.5kgs AVR-1500W------38.5*32.5*22cm---2pcs/ctn---14/13kgs AVR-500S------54.5*31*20cm---4pcs/ctn---16/15kgs AVR-1000S------54.5*31*20cm---4pcs/ctn---21/19kgs AVR-1500S------31*28.5*20cm---2pcs/ctn---17/16kgs AVR-2000S------32.5*32*23cm---2pcs/ctn---21.5/19.5kgs AVR-3000S------32.5*32*23cm---2pcs/ctn---26/24kgs AVR-5000S------52.5*42.5*35cm---2pcs/ctn---31.5/29.5kgs AVR-7500S------41.5*26.5*34cm---1pcs/ctn---24.5/22.5kgs AVR-10000S------41.5*26.5*34cm---1pcs/ctn---27.5/25.5kgs we also can provide OEM service.