Intuitive alignment - innovative three-point self-alignment system is practical and intuitive-when one point is adjusted, the other two adapt their inclinations accordinglyEasy tilt adjustment - use the ratcheting wrench to change yaw direction and the plate lifters to adjust pitch and rollSecure system positioning - the force required for adjustment is low; once the desired position is reached, the system remains fixed, stable and constant over timeTruss mounting - mount the stacking frame securely using truss clamps (not included); the frames smaller plate features two holes that accommodate M10 clamp fixing screws (not included) for truss mountingMicro adjustment ranges - roll: 3 degrees; pitch: 3 degrees; yaw: 4 degreesVersatile design - compared to the ELPMB81 Tilt Adapter, the ELPMB77 can be mounted directly to the projector; it can be placed on the ground with included feet, hung from a ceiling, and has the ability to make more precise adjustmentsSturdy, convenient design - for outstanding functionality and ease of use; dimensions (W x D x H): 15.4" x 14.3" x 3.9" (390 mm x 362 mm x 100 mm)Compatible - attaches to Epson projectors directly or to the Alfa (ELPMB76) and Beta (ELPMB84) projector stacking framesSupports Epson projector stacking frames - attaches to the Alfa (ELPMB76) and Beta (ELPMB84) projector stacking framesLinear adjustment - for fast and precise installation of ultra short throw (UST) or other projectors without a zoom lens, utilize the ELPMB85 rail adapter for fine forward/backward adjustmentEco FeaturesEnd-of-life options available1Epson America, Inc. is a SmartWay Transport Partner2Better Products for a Better FutureFor more information on Epson's environmental programs, go to eco. epson. com. Epson ELPMB77 Tilt Adapter Mounting Plate for Stacking Frame.