Specification grade head with precision internal gearing mechanisms that allow for hot aiming and are self-locking. Rotates 360 degrees and pivots 0 to 90 degrees. Up to two lenses or louvers (sold separately) are held captive inside the lamp cartridge which includes an integral glare reducing snoot. Lamp cartridge and lens orientation adjust 180 degrees. Lamp cartridge is keyed to maintain accurate focus during relamping. All functionality can be finetuned using a phillips or flat head screwdriver and with the guide of accompanying markings. Low-voltage, MR16 lamp up to 50 watts (not included). Use with Monorail.