Item Type: Aquarium Thermometer Material: Plastic Test Range: -50-70 Test Accuracy: 1 Applicable Objects: Suitable for Tropical Fish Tanks, Grass Tanks, Tortoise Tanks, etc Battery Type: One LR44 (Without Battery) 1WATERPROOF: The thermometer has a waterproof design, which can be completely immersed in water for more accurate temperature measurement. 2FIRM ADSORPTION: Reliable quality, built in sensor, suction cup can be firmly adsorbed in the inner wall of the aquarium, beautiful and generous. 3EASY TO INSTALL: Just find the best position in the fish tank, then connect the device with the small suction cup, no complicated operations. 4WIRELESS: The fish tank thermometer works accurately, without any external wires and probes, it will not make your fish tank look messy, and will not affect the fish. 5EASY TO READ: The digital display shows the temperature, you can read the accurate temperature of the fish tank with a single glance, which is very convenient.1 xThermometer