Stage/theatrical lighting control. Lite-Puter P-406 full wave, zero-crossing power packs in good working condition. Some cosmetic scratches on the front. All channels on all of the packs have been tested and work well. Packs are analog controlled and use 8 pin DIN connectors input to the controller. They are rack mountable - 1/2 rack space wide (picture shows them in a custom made rack fronts and backs). They are rated at 10amp per channel with 15 amp total per pack. Three packs are available - price is for one pack. There are no controllers or cables available - just the packs. Purchase all 3 packs and get the case included free.