The Q11 with Sentry Xpress 3-Key Controller is a front loading, Steel Chassis Kiln with Insulating FireBrick and a groove mounted element. It measures 6″W x 6.25″H x 6″D inside. The Q11 is rated to 2350°F. It fires on 120 Volts and needs no other heating source. Rated to 1440 Watts.