The Appotronics AL-MK750A is a 7,500-lumen 4K UHD laser projector from the M Pro series, supplied as a body only with a choice of optional lenses. It is aimed at mid-sized venues such as auditoriums, lecture theatres, museums, houses of worship and event spaces. A single-chip 0.47-inch DLP engine delivers 3840 x 2160 resolution, and Appotronics' ALPD laser-phosphor light source (red ratio above 12%, 100% Rec.709) is rated for 20,000 hours, with a native contrast of at least 1,300:1 and 95% uniformity. Four optional lenses cover 0.5:1, 0.7-0.9:1, 1.0-1.6:1 and 1.54-2.48:1 throw ratios for images from 80 to 300 inches, with motorised lens shift of +/-50% vertical and +/-20% horizontal. MEMC motion compensation, AI picture enhancement, 4-point keystone, curved-surface and multi-point geometry correction and edge blending make multi-projector and irregular-surface setups easier. It installs at any angle (360 degrees), has an IP6X dust-proof optical engine, and offers two HDMI inputs, HDMI out, HDBaseT, S/PDIF, LAN, RS-232 and 3D sync. Power draw is 600 W typical, noise 36 dB, and the body measures 460 x 388 x 138 mm, 12.5 kg without lens.