2010 SL-Laser model ProDirector-4, 4-head system includes four (4) projectors with universal mounts, two (2) PC terminals with stands and all available cables. Green laser projection. In working order when decommissioned. Replacement cards no longer available. Projectors can be used to prolong the life of an existing PD-6 projector. 120 v, 1 phase electrical required.