This device is ideal for the detailed control of direct current motors (small drills, modeling, etc.). It can also be used to control lighting level, e.g. to adjust the interior lighting in a bus. Special for the adjustment of LED strips, LED bars, and individual LEDs, as well as LED lamps as long as they have this feature (Dimmable). 
 The big advantage of this device is that you do not have large power losses. Suitable for 12 and 24VDC up to 250W. To have maximum power, depending on the voltage, the mosfet needs a heat sink. Easy to assemble.