Zilla Aquatic Reptile Preset Heater100w submersible preset glass heater set at 78 degrees. Internal safety shut off to prevent overheating. Encased in a plastic guard to prevent possible damage from turtles and other aquatic reptiles. Cord is coil wrapped to prevent damage and protect reptiles who might be tempted to chew on the cord. Equipped with suction cups to hold firm to side or bottom Designed for terrariums up to 40br containing up to 30 gallons of water.