Yield Lab Variable Fan Speed Controller 3 Settings for Grow Tent and HVAC Intake and Exhaust Duct Fan Ventilation System QUALITY DESIGN: If you are looking for a quality speed controller for your fan, look no further! Using a hard plastic shell and metal mounting clip, enjoy the accessibility of fitting this in your grow area. The rheostat dial allows ease of use and simplicity when choosing what fan speed control setting you like. With a 3 -prong grounded export plug, this controller is ready for use with almost all household plug types. MULTIPLE SPEEDS: Never get stuck with a one speed setting on your fans ever again! With variable settings at low, medium and high you can easily modulate your fan speed depending on the size of your room. SAFETY AND PROTECTION: When it comes to your grow, your safety and protection is of the upmost importance. Featuring an easily removable fuse, this device is protected in the event of power surges and item malfunction. WIDE VARIETY OF APPLICATIONS: If you do not have a grow tent, do not fret as this controller can be applied to many situations. These can include but are not limited to; greenhouses, kitchens, bathrooms, grow rooms, and many other HVAC set ups. So whether you need controller for your indoor or outdoor ventilation system, this item is for you. INCLUDED COMPONENTS: 1x Yield Lab Variable Fan Speed Controller