There is a large LCD digital display screen in this thermometer, which is easy to read data. It has a sucker that can be attached to a fish tank or a wall. With accurate measurement and wide temperature range, this thermometer can test the temperature of fish tanks, aquariums, feeders, etc. And it can switch between Fahrenheit and Celsius. It is constructed of plastic material. The length of this product is 57mm and width is 35mm. It is suitable compatible use at home, aquariums, offices, etc. Item Name: Thermometer Material: Plastic Features: with Suction Cup, Easy to Read, LCD Display Power Supply: DC 1.5V LR44 Button Battery (Not Included) Measurement Temperature Range: -50 Degrees Celsius ~ +70 Degrees Celsius Accuracy: Plus or Minus 1 Degree Celsius Operating Temperature Range: -10 Degrees Celsius ~ +50 Degrees Celsius Switchable: Fahrenheit and Celsius Size Details: Thermometer Size: 5.7cm x 3.5cm x 1.7cm/2.24" x 1.38" x 0.67" (Approx.) Screen Size: 2.6cm x 1.4cm/1.02" x 0.55" (Approx.) Probe Cable Length: 97cm/38.19" (Approx.) Notes: Immerse the probe into the fish tank to measure the water temperature. (immerse the probe into the water only, do not immerse the thermometer into the water) Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Thermometer