Industrial Strength Heater for Heavy Tortoises and other Large Reptile Cage Applications. 120 Volt, 40 watt heater with LED light totell you when the heater is "on" - Automatic thermostat protection shuts-offheater 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 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 to 80% electrical savings over other heating devices!