I received this from an acquaintance, but I am selling it now because I purchased a different model. It seems it was used for ceiling mounting, and I have only confirmed that it starts up and that the lamp works. Focus adjustment, lens shift, etc. can be adjusted without any problems. Aluminum tape seems to be attached to the back to remove static electricity? This is a used item with 5826 hours of use, so please understand the condition. I am a projector beginner, so I don't know the details. Please ask any questions. Main Features Employs laser light source technology "BLU-Escent," achieving both high brightness of 3000lm and a long lifespan of approximately 20,000 hours. Supports HDR (High Dynamic Range) content with rich video information. Equipped with an "Auto Tone Mapping" function that automatically adjusts HDR10 content to the optimal image quality. Achieves high image quality and ∞:1 contrast through dynamic light source control. Equipped with a wide lens shift with a movement range of 60% up and down, and 23% left and right. Equipped with a 1.6x zoom compatible high-resolution all-glass lens. Equipped with a 0.47-inch DMD, realizing high-definition 4K video and a compact body. Equipped with HDMI terminals compatible with 18Gbps/HDCP2.2, fully supporting 4K signals.