Dukane Digital-Multimedia Projector None - Manual (Page 47)

Maintenance and Troubleshooting
Ceiling Mounted Installation Guide
Attach the optional ceiling mount at four-suspension bracket fixing points when
suspending the from a ceiling.
A special method of installation is required in order to suspend the
projector from the ceiling. Please ask your dealer for more details.
47
MAX M 4 x 8mm FOR MOUNT