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. * Using LED digital display, temperature can be shown clearer and be checked easier even in long distance, wider angle of view, or night time. * Design with compact, decent, novel and faddish appearance. * More convenient with USB connector, also with a Voltage Converter.