It can measure the fish tank water temperature. The high-accuracy tool directly measures the water temperature with precision and small error. This product is constructed good material for and practical to use. Features - Color: Black - Material: ABS, LCD - Size: About 11.80X3.00X2.85cm/4.64X1.18X1.12inch - Time display range: 1∶00-12∶59 - Temperature range: -50 degree centigrade (-58°F) ~ +70 degree centigrade (158°F) - Accuracy: ±1 degree centigrade - Resolution: &gt; -20 degree centigrade for 0.1 degree centigrade <=-20 degree centigrade for 1.0 degree centigrade - Power: DC 1.5V 7#alkaline battery(Not Included) - Energy saving and low-power consumption, ensuring a long endurance time. - Adopt the creative design, convenient to fix and use, just stick it on a smooth surface. - Double temperature probe, can be at the same time two temperature. - The material is safe and durable, which is wear resistance and practical for the long time use. - Round edges and smooth surface, safe to touch and do not hurt your hands. Package list: 2 x Temperature clock display 2 x Thermal Detector 2 x Specification