HTC-2 Mini Thermo-Hygrometer, a popular digital device used to monitor temperature and humidity both indoors and outdoors.
Main Features:
Temperature Display: Indoor & outdoor (with external sensor probe)
Humidity Display: Indoor only
Display Format: Celsius (°C) or Fahrenheit (°F)
Clock & Calendar: 12/24-hour display, includes date and day
Alarm Function: Yes
Memory: Displays max/min temperature and humidity values recorded
Large LCD Display: Clear reading of time, temperature, and humidity
Power Source: Usually 1 x AAA battery