Meade Instruments TS33F-M Temperature and Humidity Sensor with Probe, White Indoor/outdoor temperature and humidity Outdoor temperature range: lithium batteries:-38-Degree fahrenheit to 158-Degree fahrenheit ;-38.8-Degree celsius to 70-Degree celsius Indoor/Outdoor Humidity range 25-percent to 90-percent; alkaline batteries:-4-Degree fahrenheit to 158-Degree fahrenheit ;-20-Degree celsius to 70-Degree celsius User-selectable transmission channels, transmission range of up to 100-feet;30-meters Removable temperature probe with 10-feet ;3-meters cable, LCD displays temperature and humidity