Viewsonic PJ551D, 2200 ANSI lumens, DLP, XGA (1024x768), 2500:1, 27.2/250, 31 - 79 kHz Viewsonic PJ551D. Projector brightness: 2200 ANSI lumens, Projection technology: DLP, Projector native resolution: XGA (1024x768). Light source type: Lamp, Service life of light source: 3500 h, Service life of light source (economic mode): 4000 h. Focus: Manual, Focal length range: 21.95 - 24.18 mm, Throw ratio: 1.97 - 2.16:1. Noise level: 34 dB, Certification: CB, CE, GOST-R, Hygienic, TÜV/GS, UL/cUL, FCC-B, ICES-003, IRAM, NOM, SASO, UKrSEPRO, PSB,.... Market positioning: Portable https://www.techradar.com/reviews/pc-mac/monitors-and-projectors/data-projectors/viewsonic-pj551d-419383/review ViewSonic has built its PJ551D around a 0.55-inch DLP chip that offers a native resolution of 1024 x 768 pixels. It lets the side down slightly as the maximum resolution can only be stretched to 1280 x 1024 pixels, rather than the widescreen 1400 x 105... Decent performance, Budget price Frustrating remote, Basic connectivity, Quite noisy