Industrial Strength Heater for Heavy Tortoises and other Large Reptile Cage Applications. 120 Volt, 40-watt heater with LED light to tell you when the heater is “on”. Automatic thermostat protection shuts off the heater at 119°F (48°C) to prevent overheating. Water-resistant construction. Made from easy-to-clean, moisture-proof high-density polyethylene plastic. Metal protection on the power cord to help prevent damage from tortoises and other animals. Mounting rails molded into heater allow for secure placement on the floor or side of the enclosure. 75-80% electrical savings over other heating devices. Size: 18" x 18"