Features: Stick-on Induction Thermometer senses- water temperature through probe-, cordless- design, no messy- wires in the water, providing a clean and safe environment for fish. LED screen to display temperature, LED can provide wide viewing angle and the color is saturated, it is easier to read the data no matter day or night. green environmental protection and energy saving. Tank Thermometer Aquarium just needs- to tear off the adhesive and stick- it below- the water level on the outside of the tank-. Measuring range: 0-50. The thermometer tank fish built-in CR2032- battery button, the battery is long-lasting. Mini design, easy to use. Digital thermometer is suitable for different water types such as fresh- water, tap water, salt water, sea water, etc., to provide the most comfortable water environment for your beloved pets. Specifications: Material: ABS- Accuracy: -0.1 Measuring range: 0-50 Battery: 1xCR2032 Size: approx 6x3.5x0.9cm/2.4x1.4x0.4-inch Note: Please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1xAquarium Thermometer