The Cobalt Aquatics Neo-Therm fully submersible electronic heaters feature a modern, super flat design with an easy to set "one touch" control system. The advanced electronic thermostat is accurate to ±0.5° and includes a LED that displays both the Set Temp and Tank Temp simultaneously and has a Set temperature range from 66° up to 96°. For ultimate safety and reliability, integrated thermal protection circuitry shut the heater down before it can overheat and its shatterproof outer casing make the Neo-Therms virtually indestructible. Perfect for freshwater and saltwater aquariums and terrariums. Available in 75-300 watt sizes. 3 year warranty.