The electronic thermometer is compact and delicate, adopts eco-friendly material, with good workmanship, sturdy and durable to use Clear LCD display, Celsius & Fahrenheit, time display function conversion function, convenient for reading data and daily use Dual meter probes to measure indoor and outdoor temperature Easy to use, high precision, visual display Widely apply to refrigerator, air conditioner, freezer, fish, incubator, aquarium and greenhouse. Ideal for home, office, car, etc. Specification: Condition: 100% New Timer display range: 1:00-12:59 Temperature range: -50°C~+70°C (-58°F~+158°F) Accuracy: +/- 1°C Temperature over -20°C Resolution: 0.1°C Temperature below -20°C Resolution: 1°C A is a built-in sensor probe to detect the temperature of the door around. B is outside the sensor probe, put it in the place where you need to measure the temperature, the LCD screen will display the temperature data. Time setting: (1) Press the FSW button to switch the LCD display and time display.