RoHS stands for Restriction of Hazardous Substances. RoHS, also known as Directive 2002/95/EC, originated in the European Union and restricts the use of specific hazardous materials found in electrical and electronic products (known as EEE). All applicable products in the EU market after July 1, 2006 must pass RoHS compliance. The substances banned under RoHS are lead (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium (CrVI), polybrominated biphenyls (PBB), polybrominated diphenyl ethers (PBDE), and four different phthalates (DEHP, BBP, BBP, DIBP). RoHS Viewsonic PJD2121, 400 ANSI lumens, DLP, SVGA (800x600), 1800:1, 4:3, 889 - 3810 mm (35 - 150") Viewsonic PJD2121. Projector brightness: 400 ANSI lumens, Projection technology: DLP, Projector native resolution: SVGA (800x600). Light source type: Lamp, Service life of light source: 2000 h, Lamp power: 50 W. Focus: Manual, Throw ratio: 1:1. Analog signal format system: NTSC, Supported graphics resolutions: 1280 x 1024 (SXGA), 640 x 480 (VGA), 800 x 600 (SVGA), Supported video modes: 1080i, 480i, 480p, 576i, 576p, 720p. Optical disc player type: Not included https://www.pcmag.com/review/248419/viewsonic-pjd2121 The ViewSonic PJD2121 ($450 street) doesn't fit into any of the usual projector pigeonholes. It's bigger than a palmtop, but not by a lot. It's significantly brighter than one, but not bright enough to match conventional portable projectors. It also ha... Smaller and lighter than most standard projectors. Brighter than palmtops. Only video connection is for component video. No control for computer mouse. The ViewSonic PJD2121 is a touch larger than palmtop projectors, but it's also brighter, which lets it do a better job standing up to any given level of ambient light. Buy it now... https://techcrunch.com/2009/12/16/review-viewsonic-pjd2121-projector/ Short Version: The PJD2121 is a portable projector mainly intended for the business user. The display is bright, the colors crisp, and the contrast is high enough that you don’t need to be in a room with blackout curtains to use it. The price is pretty... https://www.projectorcentral.com/Viewsonic%20_PJD2121_%20portable%20_projector_reviews.htm The Viewsonic PJD2121 portable projector produces a fantastic image, has a short throw lens and is simple to set up and use. It comes with some novel features and options such as the wireless gateway and is backed by one of the most comprehensive war... The Viewsonic PJD2121 produces a fantastic image, has a short throw lens and is simple to set up and use. It comes with some novel features and options such as the wireless gateway. It is backed by one of the most comprehensive warranties in the busin...