Features: Lightweight, simple design, small and exquisite, fashionable and beautiful. You can change units of temperature. Digital display, convenient reading, large range, and high accuracy. Submersible suction cup, deep waterproof, practical to use. Put the thermometer head into the fish tank to measure water temperature. (Do not put the whole thermometer in water) Suitable for Aquarium Temperature measuring. Specification: Condition: 100% Brand New Material: plastic Color: as picture shown Screen size: approx. 5.5x3.5cm/2.2x1.4inch Measuring range: -50℃~+70℃ Working temperature: -10℃~+50℃ Resolution: ±0.1℃ Accuracy: ±1℃ Temperature unit switch: between °C and °F Power source: 1.5 V Battery: 1 x LR44 button battery (Not Included) Package List: 1 x Aquarium Thermometer (Battery Not Included) 2 x Suction Cup