Indoor/Outdoor temperature & humidity °F units of measure only Outdoor temperature range: lithium batteries: -40°F to 140°F Outdoor temperature range: non-lithium batteries: -4°F to 140°F Indoor/Outdoor Humidity range 1% to 99% Comfort level indicators Min/Max Memory for indoor/outdoor temperature & humidity Monitors temperature and humidity in up to 3 remote locations Included remote sensor (FT005TH) transmission range of up to 300 feet line of sight (100 feet under most conditions) Console Dimensions (LxHxW): 4.50 x 3.75 x 1.00 in LCD Dimensions (LxW): 2.75 x 1.75" LCD Segment Height: 0.78 inches Power requirements: Main Unit - 2 x AA (not included) Remote Sensor - 2 x AAA (not included.