Soondar&reg; Professional LED Digital Thermometer for Hydroponics & Aquaculture, Amphibian & Reptile Terrariums, Freshwater Tropical Fish & Saltwater Fish Aquariums With high-performance microcomputer chip and high-accuracy sensor, the thermometer can check the temperature inside aquarium tanks more accurate. As its build-in probe of completely waterproof design, the whole appliance can be set up within water. Design with compact, decent, novel and faddish appearance. Using LED digital display, temperature can be shown clearer and be checked easier even in long distance, wider angle of view, or night time. More convenient with USB connector.