Meade Instruments TE109NL-M Wireless Indoor/Outdoor Thermometer Wirelessly monitors outdoor temperatures Wireless sensor has transmission range of up to 150-feet Measures temperatures to as low as minus 38-Degree fahrenheit and up to 158-Degree fahrenheit Clock includes crescendo alarm and multi-language display Measures 3.02 by 5.16 by 1.11--inch ;W by H by D