... provides 30 different charts and 35 masks Auto Chart projector Specifications HWOE-6 Auto Chart Projector is a precision optical instrument for ... conversionOne mask per 0.03sProgram2 sets programs, each program contains up to 30 stepsLight source12V,50W Halogen LampAuto-off functionAfter 10 ... glasses, fuses(2), batteries(2)Optional accessoriesFloor stand, wall stand Auto Chart projector