The smart environmental monitor puts the information that matters in the palm of your hand, wherever you are. A WiFi connection is required. Read the setup guide here. Real-time and historical data: Vapor Pressure Deficite Temperature Relative Humidity Light Intensity Dew Point Included features remotely accessible via the Pulse app (PC, iOS, Android). Unlimited number of sensors & live data, including multiple locations & WiFi networks viewable on one dashboard Instant, reliable alerts customizable to each zone Easily adjust alert profiles on multiple devices with the template manager Day & night averages for any selected time period Connectivity & power outage notifications VPD-LST offset calibration for accurate VPD data Garden calendar & journal Pulse One Features Temperature sensor Humidity sensor VPD sensor Dew point sensor Atmospheric air pressure sensor Light sensor (tracks if lights are on or off) Battery-powered option Splash resistant design Notifications and alerts Tracks power outage, connectivity loss, and low battery For added co2 logging, PPFD and colour spectrum analysis, check out the Pulse Pro!