It is a Digital Meter/Digital Thermometer/Temperature Tester, Measuring temperature Range -50 ~ 110°c,Power Supply DC 12V (DC4.5~15V), it has Reverse polarity protection ,small size, high efficiency, long term stable and reliable quality,easy installation and use. Applied to the Indoor, Outdoor, Car,Water, Refrigerator, Aquarium ,home,factory,garden,And other platforms.