Observe students' work from your desk. Blank screens to focus attention. Students can switch between the teacher's display and their own with the student controlled system. Connect hundreds of trainees to student-controlled system. Send instructor's video to selected students.
All students view their own computers.
All students' screens are blanked out. Lighted buttons show selected students at a glance. Video connectors are 13W3 female. No external power is required. All video connectors are female 15 pin high density.