Fix this advanced digital thermometer on the outside of your window with the strong sucker and read the temperature outside, from inside, at a glance. Particularly helpful for gardeners to predict temperature drops and frost during the early planting season, its accurate to one degree and updates every 10 seconds! Displays min/max temperatures over 24-hours. Deg C and Deg F switch. Temperature range, -20C to +70C (-4 to 158F). 1 xLR44 battery (included). H10 xW9 xD2cm.