Features: 1.[LCD Display] This aquarium thermometer has a large digital LCD screen with a simple, large display for clear and more intuitive data reading. You can know the temperature of your aquarium easily. 2.[IP68 Waterproof] Exterior of the aquarium thermometer is made of PC and ABS with airtight technology, IP68 waterproof, so you don't have to worry about using it in water. 3.[High Accuracy] This digital fish tank thermometer can be accurate to 0.1 change. Ideal for real time monitoring of aquarium or indoor temperature changes. 4.[Wide Range] Digital aquarium thermometer offers a temperature measurement range of 1 to 45 to meet the needs of different places, more convenient than just for use in aquariums. 5.[Suction Cup Fixing] Submersible fish tank thermometer with transparent silicone suction cup fixing, with strong suction and unique shape, can be fixed on the tank or glass wall. Specification: Item Type: Aquarium Thermometer Material: PC, ABS Thermometer Diameter: Approx. 4.6cm/1.8in Battery Type: 1 x LR54 Button Battery (Shipped with Matching Battery) Battery Capacity: 70mAh Waterproof Level: IP68 Fixing Method: Silicone Suction Cup PackageList: 1 x LR54 Button Battery 1 xAquarium Thermometer 1 x Coin Note 1. To install or replace the battery, use a coin to unscrew the back cover, and the back cover must be screwed tightly after installation to prevent damage caused by water in. 2. Manual measurement, please allow some errors.