Bring 4K clarity to classrooms, conference rooms, and office spaces that cannot always be darkened. The Optoma 4K400X projects True 4K UHD resolution with 4,200 lumens of brightness, helping text, graphics, and video stay legible in challenging lighting conditions. HDR and HLG compatibility adds more depth to compatible content, while support for 1080p at 240 Hz and 4.2 ms input lag makes motion look clean and responsive. This model is built for environments where presentation quality and flexibility matter. Dual HDMI inputs simplify source switching between laptops, media players, and room systems. USB power, audio connections, a 12V trigger, and RS232 support make it easier to integrate into installed AV setups. With a 1.5-1.66 throw ratio, the 4K400X fits a wide range of room sizes without forcing major layout changes. For teams that need a projector that can handle both polished presentations and high-detail content, the 4K400X delivers the brightness, resolution, and connectivity expected in a premium business display system.