Png 030 Humidity Display Grow Media Two outlets to plug your Two outlets to plug your gear into (Do not exceed rated amperage)Red switch to change from "TIMER to ALWAYS ONFifteen (15) minute intervals for various timing schedulesUnderwriters Lab (UL) listed in United States and CanadaEasy to use and simple to operateHeavy duty construction15 Amps 120 Volts 60 Hz equipment and other clean surfacesExterior scaffold coverRoom separator dividerConcrete curing coverCovering for large materials outside for weather protectionInstant all purpose coverInterior moisture barrier insulator for unprotected windowsPainting drop cloth: use to cover carpets and floorsWaterproof exterior storage coverCamping tent coverSun shield reflects heat (white side)Landscape nursery ground cover for level beds to prevent weedsCover beneath decks The PNG 030 is a friendly humidity controller that has been developed to offer both accuracy and simplicity at the same time Change from humidification to dehumidification with a push of a button