Extron electronics, Projector Accessories, models:

Extron SS 200	Specification Sheet
HC 403 EU	Setup Manual
PCM 240	User Manual
PMK 350	Specifications
PMK 450	Installation Notes
Pole Mount Kit PMK 450	Specifications
System 10 Plus	User Manual
System 8 Plus	Specifications
System 8/10 Plus	Configuration And Connections