Extech’s Big Digit Thermometer simultaneously displays indoor and outdoor temperatures plus it has 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 easily be installed through windows, doors, or any small openings leading outdoors or inside a refrigerator/freezer or temperature-controlled areas/rooms. Internal memory stores Min/Max readings over time. The thermometer includes a built-in stand for desktop display and a mounting bracket for wall display.