Designed for RV and home use, the TempMinder Wireless Thermometer and Clock allows you to receive wireless temperature readings from up to three remote sensors (one sensor included) from up to 165' away. The Thermometer also stores minimum and maximum temperatures. Displays temps in Celsius or Fahrenheit. User-selectable 12/24-hour clock. Display operates on two AAA batteries; sensor operates on two AA batteries. Batteries not included.