This digital thermometer is a must-have for any fish tank or aquarium owner. Its LED display provides clear and accurate readings, while its adhesive design makes installation a breeze. Its compact design means it won't take up too much space in your tank or aquarium. Features -Color:Black -Material:ABS -Size:4.70X2.70 .00cm/1.85 .06X0.39in - measurement range: -10° C ~ +60° C (14°F~+140°F). - Battery: 3V - High and low automatic alarm (high 34 ° C, low 15° C) - Safe and convenient to use, not easy to break or deform, reusable and can be applied for longtime. - Easy to install, with no complicated wires or tools required. Small and compact Fish Tank Thermometer. - Stick-on Thermometer with backside sensor checking fish tank . - Touch button to display . Automatically enters the energy saving after about 10 seconds. - Paste it on the position below the water level outside the aquarium (do not put it into the water), and let it stand for 10 minutes to measure the accurately. Package list: 1 Tank Digital Thermometer