The EHEIM Jager TruTemp Fully Submersible Aquarium Heater, rated at 150W, provides advanced features for effective temperature control in both marine and freshwater aquariums. Its thermo safety control prevents overheating by automatically shutting off when out of water, and the shatterproof glass construction ensures durability. With precise temperature regulation and a TruTemp dial with a re-adjustment ring, users can achieve accurate temperature settings. The heater is fully submersible and waterproof, with an extra-long 5'6" cable for easy placement. It comes with a clamp and two suction cups for secure mounting. Suitable for aquariums up to 79 US gallons, this heater also features an on/off indicator light for added convenience.