The Netatmo Smart Weather Station measures your local climate data. You can easily access the measurements via your smartphone. The station measures temperature, air pressure, air quality, and humidity in real time. With customizable notifications, you'll also be automatically alerted to frost. The indoor module of the weather station measures comfort levels in your home, provides important information, and warns you when it's time to ventilate rooms to improve air quality. Included in the box: 1x indoor module, 1x outdoor module, USB cable, 1x USB power adapter, 1x wall mounting kit for the outdoor module, 4x AAA batteries