Its 2 side-only heating plates radiate heat evenly. Heat-rate capacity allows the oven to reach the desired temperature quickly. Open-door detection protects the oven’s heating elements. Thermocouple is sheathed in metal to provide corrosion resistance against investment gases. Capacity: up to fifteen 1-3/4" rings. Power usage: 1680 watts. 120 volts. 1-year warranty. Made in the USA.Dimensions:–Overall: 18"H x 16"W x 13"L–Chamber: 6"D x 8"W x 8"L