1. Professional Aquarium ThermometerThe small thermometer is composed of quality ABS plastic housing, electronic components and adhesive backing, which provides accurate temperature and low energy consumption. It has a diameter of 5 cm/1.97 inches and a thickness of 1 cm/0.39 inches. It is ideal for attaching to various aquatic environments and reptile habitats such as fish tanks, reptile tanks, aquariums, turtle tanks, etc. It will not hinder your play with your pets. 2. Accurate Temperature DetectionThe small aquarium thermometer adopts a smart chip with a temperature measurement range of 9.9 50°C/49.82 122°F and an error of ±0.1°C/32.18°F, providing accurate readings for your fish tank or reptile habitat. 3. EasytoRead LED DisplayThe digital aquarium thermometer has a digital display that displays the current temperature at the touch of a switch, allowing you to monitor the temperature at a glance, and the temperature display lasts up to 30 seconds, making it an ideal choice no matter whether it is day or night. The values can be easily read. 4. Longlasting Battery LifeThe small aquarium thermometer has low energy consumption and a builtin 5v lithium manganese battery, which can support about 45 days of normal use and about 5 years of standby time, ensuring longterm use. The thermometer is equipped with a USB charging port design for convenient charging.