Feature: 1. PREMIUM MATERIALS: The aquarium heater exterior is made of glass and ABS materials, with mechanical quartz heating rod inside, fast heating. 2. ENERGY SAVING: Fish tank heater adopts mechanical intelligent temperature control technology, iron chrome wire for fast heat conduction, power saving. 3. IPX8 WATERPROOF: The fish tank heating rod has a three layer sealed structure, IPX8 waterproof, no leakage of electricity, freshwater and seawater are applicable. 4. ADJUSTABLE: Submersible aquarium heater adopts knob type adjustment, precise and convenient temperature, clear water level line scale, safe and eye catching. 5. CONSTANT TEMP: Safe and explosion proof thickened quartz tube, stable and heat resistant. Intelligent thermostatic mode, heating for one hour, constant temperature for three hours. Specification: Item Type: Fish Tank Heater Material: Glass, ABS Use: Fish Tank, Aquarium Heating Rod Applicable Water Volume: Below 300L. Package List: 1 x Fish Tank Heater2 x Suction Cup