Feature: 1. WATERPROOF: The thermometer has a waterproof design, which can be completely immersed in water for more accurate temperature measurement. 2. FIRM ADSORPTION: Reliable quality, built in sensor, suction cup can be firmly adsorbed in the inner wall of the aquarium, beautiful and generous. 3. EASY TO INSTALL: Just find the best position in the fish tank, then connect the device with the small suction cup, no complicated operations. 4. WIRELESS: 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. 5. EASY 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. Specification: 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). Package List: 1 x Thermometer