Item Type: Submersible Aquarium Heater_x000D_ Material: Glass, ABS_x000D_ Use: Fish Tank, Aquarium Heating Rod_x000D_ Applicable Water Volume: Below 80L 1SAFE MATERIAL: The exterior is made of glass and ABS material, the interior with mechanical quartz heating rod, fast heating, energy saving and power saving, safe and explosion proof, intelligent heating. 2INTELLIGENT TEMPERATURE CONTROL: Mechanical intelligent temperature control technology, power saving core technology, iron chrome wire fast heat conduction, energy saving and power saving. 3ADJUSTABLE TEMPERATURE: Safe and explosion proof thickened quartz tube, stable and heat resistant, knob type adjustment, accurate and convenient temperature, clear water level line scale, safe and eye catching. 4IPX8 WATERPROOF: Three layer sealed waterproof design, IPX8 safety and waterproof without leakage, durable, fresh water, seawater are applicable. 5INTELLIGENT CONSTANT TEMPERATURE: Heating for one hour, constant temperature for three hours, intelligent constant temperature mode. 1 x Heating Rod 2 x Suction Cup