Apple ColorLaserWriter 12/600PS - Manual (Page 280)

Specifications
Marking engine
m Canon HX LBP print engine
m 3 ppm in color
12 ppm in black, cyan, magenta, or yellow
1 ppm for a transparency
m 600 x 600 dpi with Color PhotoGrade
m Enhanced 600 dpi grayscale imaging (effective 200-line screen halftone,
122 gray levels)
Laser
m Type: Semiconductor laser GaAlAs
m Wavelength: 780 nm
m Output power: 1 mW
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Appendix A
Technical Information and Printer Supplies