Installation Conditions: Point 1. Weight Capacity: 33.1 lbs (15 kg). Point 2. Screw holes on the mounting surface: There are 3 or more screw holes for mounting the hardware. Mounting surface is flat (flat). How to install the projector ceiling bracket(1) Turn the projector back to make sure there are 3 or more holes for the ceiling. 3 points are stored in a circle of 13.3 inches (33.8 cm) in diameter. Depending on the size of the projector, the metal fittings may protrude from the edges. M3, M4, M5 screws are included. (2) Fix the mounting bracket to 3 or more screw holes and mount to the plate. [Point] By adjusting the screws on the back of the mounting bracket, it can rotate 360°. Can be used for various screw hole placement.Secures bracket and plate Please prepare a separate tool for adjustment. If the projector is installed, you will need to remove the projector and work. The hardness of the factory screws may vary depending on the product, so please be careful when adjusting the angle. (3) Install the ceiling plate to the ceiling. Secures with 3 ceiling bolts. Two types of ceiling mounting: The part where there is a base and the part that has been reinforced with plywood to the base (4) Connect the projector mount and ceiling plate with a pipe to complete the finish. The projector can be rotated 360°. Product Details: External Dimensions Ceiling Side Plate, 5.9 inches (150 mm), Projector Side Plate, 7.1 inches (181 mm), Product Weight: 4.4 lbs (2.0 kg), Angle Function, Freely Adjustable, Horizontal Rotation, Load Capacity: 33.1 lbs (15 kg), Pipe Length: 7.9 inches (20 cm), Material: Steel, Accessories: Hardware body (assembly type), Mounting Screws, Japanese instruction manual (English language not guaranteed).