Digital Temperature Meter Panel, DROK -55-125 Thermometer DC 7-30V 12V 24V Pool Aquarium Baby Bath Water Room Indoor/Outdoor Celsius Temp Measure Tester Meter with DS18b20 Waterproof Probe Power supply Voltage: DROK digital temperature display panel power supply voltage range is DC 7-30V, with anti-reverse connection protection Measuring Temperature: the digital thermometer gauge measuring temperature range is -55c to 125c, please note that temp unit is Celsius (c) LED Display: our Celsius temp measure detector is showed by three digits LED display Dimension: its dimension is 33 mm x 24 mm x 17 5mm, installation dimension is 30mm x 21mm, sensor cable Length is 3 meters Application: the temp monitor meter can be applied to Cars inside/outside temperature measurement, Air-conditioned room inside/outside temperature measurement, Refrigerator inside/outside temperature measurement, Pond/Aquarium water temperature measurement and Baby bath water temperature measurement