1、Real Time Monitoring: Digital aquarium thermometer uses digital display to monitor the temperature in real time, so you can check the temperature at any time and see at a glance. 2、High Accuracy: Digital fish tank thermometer built in copper nickel plated temperature sensor, precise and sensitive, accurately sensing every 0.1℃ change. 3、Long Lasting: Digital aquarium thermometer built in CR2032 coin cell battery, ultra low power consumption, long lasting battery. Easy to install with back mount. 4、Widely Used: Fish tank thermometer is suitable for fresh water, tap water, brackish water, sea water and other different water species, providing a comfortable water environment for fish. 5、Save Space: The fish tank thermometer is compact and easy to operate and install, and takes up little space when placed in a fish tank. 1 x Fish Tank Thermometer 1 x Adhesive Backing Sticker  1 x Storage Box  Item Type: Fish Tank ThermometerMaterial: ABSSize:Length: Approx. 3.8 cm/ 1.5inWidth: Approx. 1.6 cm/ 0.6inDiagonal Length: Approx. 3.3cm/ 1.3inBattery Type: CR2032 Button Cell x 1 (Shipped with Built in Battery)Battery Capacity: 150mAhTemperature Range: 0- 99.9°CTemperature Measurement Accuracy: ± 0.1°C