Honeywell TE109NL Wireless Indoor/Outdoor Thermometer with Alarm Clock Wirelessly monitors outdoor temperatures Wireless sensor has transmission range of up to 150 feet Measures temperatures to as low as minus 38 degrees Fahrenheit and up to 158 degrees Fahrenheit Clock includes crescendo alarm and multi-language display Measures 3.02 x 5.16 x 1.11 inches (WxHxD)