Titanium Pro-Heat II aquarium heater with remote digital temperature controller provides a digital temperature LCD display that indicates actual temperature of the water. Unbreakable corrosion resistance Titanium heating tube. Double heating tube. Fully submersible. On-Off heating light and power indicator. Can be mounted either horizontally or vertically. Automatic protection device activates when sensor is disconnected or shorted. Very durable and reliable. Safe & easy to operate. Aquarium IC(integrated circuit) thermostat uses IC to control the heater to adjust desired aquarium temperature. Operating temperature range: 68 to 93 degrees Fahrenheit. Power cord length is 6 feet long to heater, & control has additional 6 foot cord to plug into wall outlet. For use in saltwater or freshwater.