EMR201 Oregon Scientific Thermometer with LED Ice Alert at $22.99,
allows you to view the environmental conditions indoors and out by transmitting data back to the main unit using 433 MHz radio frequency waves from up to 100 feet away.
Outdoor temperature readings are displayed in large LCD digits for easy at a glance monitoring. The ice alert features warns you when outdoor temperatures reach icy conditions.
Displays indoor and outdoor temperature
Features ice alert function: green LED light blinks when outdoor temperature nears icy conditions
Desktop and magnet mount options
Wirelessly transmits data from 100 feet away
Main unit uses 2 AAA batteries and remote sensor uses one AA battery (not included)