Features 1、It can display the temperature in the fish tank and the indoor temperature. Large LCD display simultaneously shows temperature. 2、No probes or messy wires in water and backside temperature sensor can stick on the outside glass of the fish tank. 3、It can be used for temperature measurement in fish tanks, turtle tanks, rooms and breeding environments. 4、The working voltage is 1.5V, and the power consumption is ultra‑low. A wise choice you should make. 5、Fahrenheit and Celsius can be converted. The temperature accuracy is ±1℃. Specifications: Item Type: Digital Fish Tank Thermometer Material: Plastic Product Size: Approx. 42 x 78 x 10mm / 1.7 x 3.1 x 0.4in Weight: Approx. 37g / 1.3oz Battery Type: Button Battery [Delivery with Supporting Battery] Battery Model: LR44 Battery Capacity: 160mAh Temperature Measurement Range: Temperature in the Fish Tank: -50 ~ +70℃ Indoor Temperature: -10 ~ +50℃ Temperature Difference Range: ±1℃ Working Voltage: 1.5V, Ultra-Low Power Consumption Package List 1 x Thermometer 1 x Button Battery 1 x Manual