The optional Humidistat works with either the Hydrofogger or the Minifogger.  It allows you to automatically control the unit.  It incorporates a sensor that turns the unit off when it reaches the desired humidity level.  Ideal for all applications requiring under 80% relative humidity.  No wiring necessary-simply plug your Hydrofogger or Minifogger into the Humidistat's Piggyback Plug and that's all there is to it!  Mounting screws included to wall mount the Humidistat.  Shipping & Handling is free when ordered with a Hydrofogger or a Minifogger.  Available in both 115 Volt/60 Hz (USA) and 230 Volt/50 Hz (International) versions.