Feature: 1. SAFE AND STABLE: Fish tank heater uses high quality nichrome heating wire, stable and durable, not affected by magnetism. Thickened quartz tube, faster heating speed, explosion proof, plastic shell can guard the quartz tube to prevent fish from scalding. 2. LED DISPLAY CONTROLLER: Aquarium heating rod with LED display controller, real time monitoring of fish tank status, 20 to 34 cycle temperature control, convenient and quick. The controller is not waterproof, please keep away from water. 3. ENERGY SAVING: When the aquarium heater rod starts working, it will instantly heat up with high power until it is close to the set temperature and starts low power constant temperature, energy saving, prolong the service life. 4. WATER SHORTAGE PROTECTION: When the aquarium heating rod leaves the water, the LED screen will show L1 and stop working with a flashing reminder, built in smart sensor, if the water can not be detected will shut down, can guard fish. 5. WORKING STATUS INDICATOR: Aquarium heater is easy to use, red light is on when the heating rod is in working condition, blue light is on when the heating stops. A variety of alarm flashing modes, easy for you to clearly grasp the working status. Specification: Item Type: Aquarium Heater Material: Plastic, Quartz Glass Use: Aquarium, Fish Tank Water Heating Suitable for Water Volume: Below 700L Suitable for Fish Tank Size: Below 180cm/70.8in . Package List: 1 x Aquarium Heater2 x Suction Cups1 x Manual