iManson TA318 Digital Thermometer with Indoor/Outdoor Temperature and Humidity Sensor(White) Large LCD screen display. Switchable temperature display: Centigrade to Fahrenheit. One hole and a stand back of the thermometer for easy hanging on the wall or standing on the desk; Can be used to check the maximum or minimum indoor temperature and humidity at the same time. Memory or erase the last minimum and maximum temperature or humidity; Outdoor temperature range: -50 to 70 Centigrade (-58 to 158 Fahrenheit);indoor temperature range: 0~50 Centigrade (32 to 122 Fahrenheit). Powered by 1 * AAA battery (not included). This multi-functional digital thermometer not only measures internal temperature, it also has an external sensor which can be placed outside for outdoor temperatures. Additionally, this unit will also measure humidity. Ideal for home, office or greenhouse. Temperature alarm. 5.5 ft sensor lead for outdoor temperatures. Fix the unit on a wall indoor with a screw or can be placed on a desktop.