Waterproof design, can be completely immersed in water. The quality is reliable, the suction cup can be firmly absorbed into the inner wall of the fish tank, and the built-in sensor is beautiful and generous. Makes water temperature measurement more accurate. Powered by LR44 battery. Very durable and easy to replace. Large transparent LCD screen, measures temperature from -0C to 50C, accuracy up to 2C. Easy to install suction cup to place the thermometer in the best place and check the temperature by a snap. Suitable for different types of water such as fresh water, tap water, salt water, marine water at room temperature for reptiles such as lizards, turtles. It can also be used for beer and wine brewing, terrarium, greenhouse, vivarium and all kinds of aquarium thermometer. Size: approx. 4.5 x 2.5 cm. Blue color Quantity: 1 piece