La Crosse Technology TX50U-IT Wireless Temperature Sensor Wireless outdoor temperature sensor for use with La Crosse Technology weather station WS-9230U-IT Transmits to a received at 915 MHz frequence from up to 262 feet unobstructed Assesses outdoor temperatures from -39.8 to 139.8 degrees F; also suitable for indoor use Requires separate purchase of a compatible display WS-9230U-IT, and 2 AA batteries; mount with provided bracket in sheltered location Measures 1-1/2 inches wide by 14/5 inch deep by 5 inches high; limited manufacturer warranty