Feature: 1. Lightweight and compact size, wet and dry dual use. 2. Large display screen, clear figures, data reading more intuitive. 3. Accurate temperature measurement, precision value to 0.1℃, more accurate temperature measurement. 4. Real‑time monitoring of aquarium or indoor temperature changes. 5. Wide temperature range, easy to use. Temperature range of 1-45 °C, can use at different places, more convenient to use. 6. Transparent suction cup with firm suction force. Fix the thermometer firmly on the tank wall or glass wall. 7. The shell is made of PC and ABS material, good sealing, can be used in the water. Specification: Item type: Fish Tank ThermometerCondition: 100% brand newMaterial: PC + ABSWeight: Approx. 46gColor: As picture shownSize: Approx. 65x14mm/2.6x0.6inWaterproof grade: IP68Display temperature range: 1-45℃ Battery: 1 x LR1130 cell battery 1.5VInstallation method Method 1: simply place the thermometer directly in the desired area Method 2: sucker paste . Package List: 1 x Thermometer1 x Cell battery1 x Uncap knob Note: To install or replace the battery, unscrew the back cover with COINS. After installation, the back cover must be tightly sealed to prevent damage caused by water.