- High-precision, easy-to-read thermometer provides instant temperature readings so you can detect changes in your aquarium at a glance. The clear display helps you assess the feeding environment quickly without complex readings. - Easy peel-and-stick installation. No tools needed. Attach to the outside of the aquarium or other smooth surfaces using the special adhesive backing for secure, simple use. - Round design adds a stylish, unobtrusive touch to any tank. The compact circular patch is visually appealing while providing reliable temperature monitoring. - Temperature-sensitive display uses color-coded markings to show current temperature. Multiple colors enable quick detection and easy averaging, making it an indispensable tool for any aquarium owner. Use scenarios - During heater adjustments or after water changes to verify target temperature in freshwater or marine tanks. - In seasonal room-temperature changes to ensure the tank stays within safe limits for fish or turtles. - On external surfaces of multiple tanks where space inside is limited, allowing quick checks without opening lids.