The Extech 401014A Big Digit Indoor/Outdoor Temperature with Alarm simultaneously displays indoor and outdoor temperatures and features a user programmable High and Low alarm for outdoor (external probe) temperature. Its wired external weatherproof probe with a 9.6ft (3m) thin cable can easy be installed through windows, doors, or any small openings leading to outdoors or inside a refrigerator/freezer or temperature-controlled areas/rooms. Internal memory stores Min/Max readings over time. Thermometer includes a built-in stand for desktop display and mounting bracket for wall display.