Feature: 1. [Stable Heating] Aquarium heater uses high quality nichrome heating wire, which is stable and power saving, durable and not affected by magnetism, creating a comfortable underwater living environment for your fish. 2. [Quartz Tube] Fish tank heating rod using thickened quartz tube, faster heating speed, explosion proof and more stable, plastic shell can well guard the quartz tube to prevent fish from scalding. 3. [LED Display] Aquarium heater with LED display controller, real time monitoring of fish tank status, 20°C to 34°C cycle temperature control, convenient and fast. Red light on when working, blue light on when heating stops. 4. [Energy Saving] When the heating rod starts working, the machine instantly heats up with high power until it is close to the set temperature and starts to thermostat at low power, saving energy and power. 5. [Safety Protection] When heating rod leaves the water, the LED screen will show L1, flashing to remind and stop working, built in intelligent sensors, if the water can not be detected will shut down, can guard fish. Specification: Item Type: Aquarium Heater Material: Plastic, Quartz Glass Use: Aquarium, Fish Tank Water Heating Suitable for Water Volume: Below 600L Suitable for Fish Tank Size: Below 150cm/59.0in. Package List: 1 x Aquarium Heater2 x Suction Cups1 x Manual Note: The LED display controller is not waterproof, please keep it away from water.