Taylor Precision Products Wireless Digital Indoor/Outdoor Weather Station Indoor (32-122F/0-50C) and outdoor (-4-140F/-20-60C) temperatures Lower outdoor temperatures achievable with lithium batteries; Indoor and outdoor humidity Includes temperature and humidity trend indicators; Daily min/max recall for temperature and humidity Features a calendar and clock with alarm; The wireless remote sensor transmits up to 200 ft The base station and wireless remote require 2 AAA batteries each, not included