With a durable design and impressive heat output, the 40 watt Zoo Med ReptiTherm Habitat Heater is an industrial strength terrarium heater specifically designed for tortoises and other large reptile cage applications. This heater boasts an LED indicator light that identifies when the heater is "on", and features an automatic thermostat protection which shuts the device off at 119°F (48°C) to prevent overheating and any harm to your creatures. The ReptiTherm Habitat Heater is made from an easy-to-clean, moisture-proof, high density polyethylene plastic for water-resistant operation. Metal protection on the power cord helps prevent chewing or accidental damage from tortoises and other animals, and the insulated heater construction reduces heat loss through the floor or sides of the enclosure, making the unit significantly more efficient overall. Sturdy mounting rails molded into the heater enable convenient and secure placement on the floor or side of the enclosure for greater versatility and freedom. Additionally, the Zoo Med ReptiTherm Habitat Heater offers an impressive 78-80% electrical savings compared to other competitive heating devices! Features a power output of 120 volts.