Features: 1. Electrical resistance PTC material, fast heating speed. 2. External fish tank control, external LED display, temperature control is more intuitive. 3. Built-in intelligent circuit board, energy conservation and constant temperature, when approaching the set temperature, the power will be automatically reduced. 4. High quality PC shell, ceramic insulation PTC material, explosion-proof and safe to use. 5. High heating efficiency, low heat energy loss, saving electricity and time. Specification: Condition: 100% Brand New Item Type: Aquarium Heater Rod Material: PTC Color: As Pictures Shown Voltage: 220-240V Plug: AU Plug Temperature Control Range: 20℃~34℃ Temperature Control Precision: ±0.5℃ Fault Display: LED Flicker Optional Power: 300W, 500W, 800W, 1000W, 1200W Power Length(cm/inch) Suitable Aquarium(cm/inch) 300W 22/8.66 80-100/31.50-39.37 500W 22/8.66 100-120/39.37-47.24 800W 26.5/10.43 120-150/47.24-59.06 1000W 26.5/10.43 150-180/59.06-70.87 1200W 26.5/10.43 180-220/70.87-86.61 Package List: 1 x Aquarium Heater Rod 1 x Suction Cup Fixed Mount Note: 1. Suitable placement: bottom filter pump tank, front and rear glass in the fish tank avoid water level under the fish tank and being covered by air pump bubbles. 2. Clean the impurities on the surface of the heating plate, especially in the hard water area, with clean water for about 2 months. 3. Observe whether there is a layer of impurities attached to the heating plate. If there is, the heating efficiency will be reduced.