The Tank Thermometer Aquarium Easy to read LED display The aquarium thermometer uses an LED screen to display temperature for clear visibility in any lighting. It provides bright, contrast readings with energyefficient operation, making it easy to read the value in both strong and low light. Longlasting, lowpower battery Builtin 3V ultralowpower lithium manganese battery requires no charging and can deliver long battery life, up to 5 years. The screen lights up when touched and automatically enters standby mode after 5 seconds to save energy. Wireless, watersafe temperature sensing Wireless design eliminates wires inside the tank, helping keep the aquarium clean and safe. It is suitable for fresh water, tap water, salt water, sea water, and other tank types, helping your pets maintain a comfortable water temperature. Easy external installation with no clutter The Tank Thermometer Aquarium is taped to the outside of the fish tank. A probe on the back senses water temperature through the glass, delivering a cordless, clutter setup. Touch the button to display the temperature; the exterior unit sleeps after 5 seconds. Practical scenarios Freshwater aquariums: monitor daily temperature while avoiding disturbance to fish and decorations. Saltwater or reef tanks: maintain stable temperatures to protect delicate livestock and corals. During maintenance or relocation: enjoy quick temperature checks without opening the tank or dealing with messy cables. Key attributes Function: wireless temperature sensing with external display Compatibility: suitable for fresh water, tap water, salt water, sea water, and other tank types Size: designed to be taped outside the tank Material: exterior housing allows watersafe sensing through the glass Performance: 3V ultralowpower battery, up to 5year life; instant readout on touch, auto sleep after 5 seconds