Item Type: Reptile Thermometer_x000D_ Material: Plastic_x000D_ Product Size: Approx. 4.8x2.8x1.6cm / 1.9x1.1x0.6in_x000D_ Battery Model: 2 x LR44 Button Batteries (Shipped with Built-in Battery)_x000D_ Voltage: 3V_x000D_ Battery Capacity: 160mAh 1It is convenient to use this mini thermometer to monitor the temperature and humidity of the water tank. 2There is an easy?to?read LED display, you can easily read the temperature of the aquarium. 3This digital humidity gauge has automatic external sensing, automatic sensing of contact temperature. 4Multi?purpose, suitable for various scenes, such as cigar box, wine cabinet, flower nursery, etc. 5Can be used at home, to have a suitable temperature and humidity for the pets to ensure that they have a good environment.1 x_x000D_ _x000D_ ThermometerPlease allow slight deviations due to manual measurement.