About this item WIDE TEMPERATURE TEST: Fish Tank Thermometer Temperature Range -58℉ ~ 158℉; Temperature measurement accuracy: ±1℉; It can be used in temperature sensing of many types of liquids, making your temperature measurement so simple. PRODUCT MATERIAL: Aquarium Thermometer uses a high-precision stainless steel sensor probe to measure the water temperature of the aquarium. The main unit uses a professional LCD display to solve the problem of not knowing the temperature of the fish tank, thus providing a healthy and comfortable water environment for all kinds of fish. LARGE SCREEN DISPLAY: Digital Aquarium Thermometer with a Large Screen 1.6 inch LCD Display, Easy to Read Temperature for Children or Older People, Real-time monitoring of changes in water temperature. LONG BATTERY LIFE: Water Thermometer Powered by LR44 Button Cell (Included), Battery Working Time up to 8 Months. Package Includes: Aquarium Thermometer 2 x Digital Aquarium Thermometer; 2*LR44 battery Included ; Gift: 2*LR44 spare battery; 4 x Suction cup mounts.