La Crosse Alerts Mobile 926-25100-WGB Wireless Monitor System with Temperature & Humidity Measures ambient air temperature and humidity Transmits to gateway in 200 ft. range Receive e-mail and text alerts for temperature and humidity, connection loss and low battery Internet and network router required (not included) Requires two AAA alkaline batteries (not included) Text and E-mail Alerts first 3 months FREE; 1 year subscription available after for $11.88 yearly ($0.99 per month)