Features : creamic type heaterdigital temperature controller with automatic temperature cut off.3 part one / off systemlow power consumption. Technical specifications : sizewattsvaltsl 12" x 12"1000 w220 v or 415 vl 15" x 15"1750 w220 v or 415 vl 22" x 22"3500 w415 vl 36" x 18"4500 w415 v