Item Type: Digital Aquarium Thermometer Product Material: ABS Battery Type: CR2032 Button Cell (Shipped with Built in Battery) Battery Capacity: 240mAh 1,LARGE DIGITAL DISPLAY: Digital aquarium thermometer has a clean and simple design, with a large green digital display for more intuitive data reading. 2,WIDE TEMPERATURE MEASUREMENT RANGE: Digital fish tank thermometer temperature sensing range 0 60℃, can meet different water temperature, more convenient to use. 3,HIGH ACCURACY: Fish tank thermometer built in copper nickel plated temperature sensor, accurate and sensitive, accurate perception of every 0.1 ℃ change. 4,MINI AND COMPACT: Aquarium temperature meter adopts mini design, easy to use, thin to 1cm size, more fit to the tank wall, easy to use. 5,LONG BATTERY LIFE: LED display aquarium thermometer built in 3V ultra low power lithium manganese battery, durable and long battery life. 6,WIDE APPLICATION: Aquarium thermometer is suitable for different water species such as fresh water, tap water, brackish water and sea water.1 x Digital Aquarium Thermometer