Superior 1 year (+) battery life! Completely wireless, battery operated sensor (AA batteries included). No gateways or wires needed. Connects to WiFi and sends text and email alerts for high/low temperatures, humidity levels, WiFi connection loss and low battery. Check-in remotely from anywhere, anytime using your mobile, tablet or PC. Connects to your WiFi and monitors temperature and humidity in your home, refrigerator/freezer, walk-in cooler, wine cellar and much more. Data logging with unlimited history. Free email and phone support 7 days a week! Fast, knowledgeable assistance. Support American manufacturing & ingenuity.