This is a great timer/switch for the home. In my laundry room I use a heavy duty fan to help with the drying of the clothes that are hanged on lines. When the fan is turned on and I do not wish to have it running indefinitely, somebody would have to monitor and turn it off. This could be a frustrating exercise, especially at night when one is sleepy. So to improve the situation, I installed the Bryant timer/switch (as I call it) to control the operation of the fan. This switch does not control speed but the duration for which the appliance should operate. It has proven to be a great asset in my home as we now can set the fan to operate for different periods of time, depending upon the nature of the fabric to be dried. For example the lighter fabrics like thin shirts may require 2 hr; while the heavy, dense materials may require 8 to 12 hrs. I have never had to go as long as 12 hr because in the tropics there is lots of hot weather. It is convenient that the setting can be interrupted at anytime and the timer reset simply by pressing the off button followed by the button for the new duration. I am very happy that I have installed this switch in my home, as it allows me to enjoy a little more sleep. The switch can be mounted in the wall or on the surface.During operation, the selected duration is displayed as a green LED. At the end of which period it switches automatically, to the off position with a red LED. The device could be used for a variety of switching off tasks such as switching off lights; switching of the tv., stereo etc., bathroom and kitchen extractors and so on, depending upon your needs. I will recommend this without any reservations whatsoever. It is really a very useful device.