Great unit from Clay Paky! This light uses a 75 watt, 12 volt EYC MR16 bulb that rotates to produce a cool looking rotating beam of light. The unit has 3 parts. The top part is where the transformer is housed and the long tube (bottom part) is where the bulb, rotation motor and optical lens is housed. In addition there is a side attachment for the color wheel adaptor. The color wheel rotates at 1 RPM from a super high quality Crouzet motor. Unit has 3 circuits. 1 for the lamp, 1 for the color wheel and 1 for the rotation motor. This unit is great for long throw applications because of the concentrated beam. Unit made in Italy.