1. Our Tank Thermometer Aquarium only needs to be taped to the outside of the fish tank to sense the water temperature through the probe on the back, cordless design, no cluttered wires in the water, providing a clean and safe environment for fish. Touch the button to display the temperature and the thermometer outside the aquarium goes to sleep after 5 seconds. 2. The aquarium thermometer uses LED screen to display temperature, which not only has great advantage in visual range, but also has good color saturation, green and energy saving. It can avoid the problem of not being to read the value in strong or low light. 3. Tank fish thermometer built-in CR2032 battery button, the battery is long-lasting. The digital thermometer is suitable for different water types, such as water, tap water, salt water, sea water, etc., to provide the most comfortable water environment for your . 4. Stick-on Induction Thermometer senses water temperature through a copper nickel-plated probe, cordless design, no messy wires in the water, providing a clean and safe environment for fish.Touch the button to display the temperature, and the aquarium thermometer will enter the sleep state after 5s. If you want to check the temperature again, you can repeat the above action. 5. Aquarium Thermometer using LED screen to display the temperature, the LED can provide a viewing angle of up to 160, which not only has a great advantage in the visual range, but also has good color saturation, green environmental and energy-saving. It can avoid the problem that the value can't be read under strong or weak light. Colour:Green Material:aluminum alloy Package Contents: 1 * Aquarium Thermometer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.