Aqueon Pro 50 Precision Calibrated Aquarium Heater, 50-Watt

The Aqueon Pro Heaters are built with a durable, non-corrosive shell for strength and even heat distribution. They have electronic thermostats for accurate temperature settings and safety. LED power indicator light turns red when unit is heating and green when set at the selected temperature. Shatterproof and nearly indestructible Adjustable heat setting 68 to 88°F, accurate to +/- 1° Precision calibrated Auto Shut-off LED light is always on: red when heating, green when not heating Dimensions 3.2" x 1.3" x 10"

Adjustable heat setting 68 to 88 F, Electronic Thermostat accurate to +/- 1 ,Shatterproof and nearly indestructible,Fully submersible Auto Shut-Off when over-heats, resets when it cools down,LED light is always on: red when heating, green when not heating,Limited Lifetime