Features: Accurately monitor your aquarium’s temperature with the wireless digital temperature gauge, temperature display ranges: 1-99°C, and a external adhesive design that avoids water contact. Ensures clear readings, while the replaceable battery offers long term convenience for continuous temperature monitoring. Ideal for fish enthusiasts, bettas owner, or lizards owners seek perfect water temperature control for sensitive fish pet. Effortlessly track conditions in freshwater tanks, fish habitats, or reptiles enclosures with this small adhesive external temperature tester. Engineered with quality ABS and advanced sensors, it delivers instantly updates to maintain great environment for underwater ecosystems. Specifications: Component: ABS, electronic component Optional Types: 2 types optional, as pictures shown. Color: As pictures shown. Width: 4.5cm/1.77in Battery model: button cell battery(included) Fixing method: double-sided glues and hanging board. Measuring ranges: 1 - 99°C Package Includes: 1pc Fish Tanks Temperature Meter note: 1.Please allow 1-2cm errors due to manual measurement, note that you donot mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.