Features: 1.EASY TO USE: Aquarium thermometer is stylish and compact in appearance, accurate and convenient for temperature measurement. 2.WITH SUCTION CUP: Fish tank temperature sensor has a strong suction cup, waterproof design, which allows it to stick firmly to the aquarium, reliable use. 3.TEMPERATURE MEASUREMENT: Reptile thermometer temperature measurement range: ?50 to 70, accuracy: +1, operating environment: ?10 to 50. 4.CORDLESS: Digital fish tank thermometer without sensor cord, with suction cups, can be fixed inside the aquarium thermometer, not afraid of falling. 5.ACCURATE MONITORING: Aquarium temperature sensor can accurately monitor the aquarium water temperature, the thermometer can be completely submerged in the aquarium. Specification: Item Type: Aquarium Thermometer_x005F_x000D_ Material: ABS_x005F_x000D_ Battery Type: 1 x LR44 Button Cell (Shipped with Matching Battery)_x005F_x000D_ Battery Capacity: 160mAh_x005F_x000D_ Product Size: Approx. 4.6x2.7x2cm / 1.8x1.1x0.8in PackageList: 1 x AquariumThermometer 1 x LR44 ButtonCell Note All data are measured manually, and there are certain errors in the measurement results.