Key Features Wireless outdoor sensor for temperature Temperature trend Low battery indicator alerts users when the battery is nearing end of charge Max/Min temperature records Provides you with precise real time indoor and outdoor temperature for your location. Features 12/24 hrs time indoor temperature (F/C) wireless outdoor temperature (F/C) min/max indoor temperature readings (F/C) min/max outdoor temperature readings (F/C) and time alarm with snooze. Powered by 2 AAA batteries (not Included). Provides you with precise real time indoor and outdoor temperature for your location. Has a wireless transmission range (up to 300 ft) and temperature trend signal strength and low battery indicator. Features 12/24 hour time indoor temperature (F/C) wi reless outdoor temperature (F/C) and HI/LO temperature readings (F/C). Powered by 2 AAA batteries (Not Included).