High Sensitivity and Stabilization design of Integrated Circuit Large and clear Digital LCD display Measuring and Controlling Temperature with 1 unit Indicators for Power and Heater 82 cm Long Temperature Sensor Adjustable Switch for Temperature Adjustable Temperature Control Range from 20 to 35 °C Accuracy with ± 1 °C Dual Power Socket and Maximum Loading Power up to 1000W Including 450 W Heating Rod Over Heating Protection for Heating Rod Automatic Power Off for Heating Rod when Measured Temperature reach 36 °C Designed for Aquarium Use 1. State of the art electronic thermostat and split type. 2. More safe and convenient: explosion proof of tubular heater will not happen during the process of water replacement. 3. For the safety, when the heater leaves water surface that heating process will be cut off automatically. 4. Relay is built in, free from EMI. 5. The confirmation with CNS qualified of standard. Installation: 1. For aquarium in-door use only. 2. Check power supply, power outlet, and voltage in comply with rated values. 3. To set desired temperature, turn the adjustment knob of Thermostat to the desired temperature. 4. Put Heater into aquarium, submerged in full, at a position with good water circulation.