Krystal Dual Fan Speed Controller Increases Efficiency and Reduces Noise. It has 2 power outlets that controls both intake and exhaust fan.

It is important to maintain a stable temperature and air pressure in your grow room. The Krystal Twin Speed Fan Controller can be programmed to control extraction to keep the room at a specific temperature. It will give you full control over negative pressure by allowing you to set the required fan speed/balance. 

There are 2 power outlets meaning you can plug in both your intake and exhaust fans at the same time. The power outlets are capable of controlling fans up to a maximum power of 320 watts.

Krystal Twin Speed Thermostatic Fan Speed Controller Contains:

1 x Krystal Twin Speed Thermostatic Fan Speed Controller