Description: Temperature Range: set temperature 18-34degrees/64.4 deg-93.2 deg Celsius arbitrary setting,automatic constant temperature, automatically shuts down when the temperature exceeds 36 degreeC/96.8 deg Intelligent Temperature Control: Automatic constant temperature function, when water temperature reaches to specified temperature value, heater will automatically stop heating, when water temperature is lower than the set temperature, heater will automatically start heating. Furthermore, Automatic shut-off feature, and overheating protection. Note: adjustment accuracy is 0.5 degreeC or 1 deg, and the display accuracy is 0.1 degreeC Applicable Scene: Suitable for fresh water tank,marine tank, tank,tortoise tank,hydroponics, pet water feeder etc. Funcational: Power: 10W, for 1-3L/0.26-0.79gallon fish tank, power: 20W, for 4-6L/1.06-1.59gallons fish tank Specification: Material: ABS, Glass Color: Black Size:5.5x2cm/2.17x0.79inch US Adapter Size Chart: Usage: After switching on the, put the heating rod tube into the water, the controller display screen shows 88.8, and then the display screen shows the temperature set last time. After 3 seconds, the controller displays the currently detected water temperature. The display displays the temperature. Press once to increase the temperature by 0.5 degreeC/1 deg Then automatically save the current temperature value. When the water temperature is lower than the set temperature 0.1 degreeC, the temperature control state is entered, and the green light is on. When the water temperature is lower than the set temperature 0.5 degreeC, it enters the heating state and the red light is on for heating. Package Includes: 1 Piece Aquarium Heater Fresh Water Aquarium Heating Pond Tank Thermostat Heater Saltwater Pool Turtle Heater Water Tank Temperature Adjustable