Great Product, does the same work as other speed controllers but for half the price. Very Pleased.

not able to use with purchased fan, voltage to low for fan to operate. Should have reserched more.

I like how this speed controller allows me to control my ventilation fans. This allows me to increase or decrease my fans rpm and tone down noise when I need to.

I'm using a 6"" duct fan for my indoor grow tent and it was really loud until I bought this. This controller allowed the motor to slow down but still offered significant airflow minus the loud noise! Great value and it gets the job done.

GrowAce has become my go to accessories shop for my grow after a great experience with their light fixtures. This item comes with the same durable and solid simple design and it works for what it is intended for. I'm at a point where I'm close to ditching this tent setup I bought and just get the rest from GroAce.com. This is the place to be!

I've been using this centrifugal extraction fan for my 5x5 tent and the fan was too powerful, so I decided to get one of these and test it. I was blown away by the results, I was able to tone down the fan speeds to my liking. It feels durable so I hope this would last.

Simple, efficient, easy to use, and it gets the job done. It significantly reduces fan noise at lower rpms. Item was well packed and arrived on time. Highly recommended!

If you're looking for a speed controller that's durable, well built, easy to use and secure then this will be it. I personally like how easily you can switch your fan's speed with this controller, allowing you to lower the speed when your fan starts to heat up.

Ingenious, simple, and it works!

I had a terrible time with my ventilation fans as they don't come with any controller. GrowAce saved me with this contraption of theirs. Their customer service was quick to lead me to this item and placed an order for me in minutes. I couldn't be more happier as this was what I was looking for for a long time.

This fan speed controller allows versatility to your ventilation fan! I like how you can easily control your fan speed, airflow, and fan noise with just one spin of the the speed dial. I highly recommend this for anyone who's using duct fans with no built-in controllers!

The fan is a great fan but is loud. The speed controller was perfect to quiet the fan and also help control the temperature. Could not use fan without controller.

I bought a couple of these and they work great! I love how the controller is fuse protected and easy to clip on my tent poles. I'll be getting some more once I decide to get another grow tent in a few months.

I really like the professional way you do business good product good price and delivery. Will use you again. Keep up good work

Yield Lab products are just wonderful and this babies work pretty well with old school fans that don't come with a built-in controller. This definitely makes controlling fan speeds possible.

The speed controller works as advertised and I'm easily able to control my motor with this device.

Lightweight yet feels durable. This gets the job done in controlling your fan speeds and motor noise. If your looking for one, then this would be it!