Modern design features barometric pressure with a historical graph from the last 24 hours, the temperature (°F/°C) and humidity (%RH) for inside and outside. Monitor a garage, storage room, attic, greenhouseor even your wine cellar with the included wireless outdoor temperature sensor with 915 MHz Instant Transmission that allows faster outdoor transmission, longer range distance of 330 feet from the base, lower outdoor temperature readings of down -39.8°F, and a longer battery life. Display uses two C batteries (not included). Temperature sensor uses two AA batteries (not included). Can be wall hung or free-standing. Self-setting time and date with automatic DST updates. Receiver dimensions: 7.49"W x 7.65"H x 1.33"D.