Feature: 1. [Use] Immerse the probe into fish tank to measure the water temperature. (immersion probe only, do not immerse the thermometer in water) 2. [Easy To Read] Fish tank thermometer with easy to use suction cup and easy to read LCD display; temperature readings within 0.1 °C. 3. [Functional Characteristics] Digital aquarium thermometer has stylish appearance, small and compact, ℃ ℉ temperature conversion. 4. [Technical Parameters] Measurement Range: ‑50℃∽ +70℃; Operating temperature: ‑10℃~ +50℃; Resolution: ± 0.1℃. 5. [Wide Application] Aquarium thermometer is suitable for water or high humidity environments such as aquariums or animal feeders, for different water types such as freshwater, tap water, brackish water and seawater. Specification: Item Type: Aquarium Thermometer Material: ABS Size: Approx. 5.8x3.5cm / 2.3x1.4in Battery Type: Button Cell (LR44) (shipped with matching battery) Battery Capacity: 160mAh Functional Characteristics. Stylish appearance, small and compact, suitable for aquarium. ℃ ℉ temperature conversion. Technical Parameters. Measurement Range: -50℃∽ +70℃. Resolution: ± 0.1℃ Accuracy: ±1℃. Package List: 1 x Aquarium Thermometer1 x Suction Cup1 x Button Battery Note: Please allow some errors due to manual measurement.