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 PJD6683WS, 3000 ANSI lumens, DLP, WXGA (1280x800), 16:10, 762 - 7620 mm (30 - 300"), 4:3 Viewsonic PJD6683WS. Projector brightness: 3000 ANSI lumens, Projection technology: DLP, Projector native resolution: WXGA (1280x800). Light source type: Lamp, Service life of light source: 3500 h, Service life of light source (economic mode): 5000 h. Focus: Manual, Throw ratio: 0.5 - 0.5:1, Offset: 130%. Analog signal format system: NTSC, PAL 60, PAL B, PAL D, PAL G, PAL H, PAL I, PAL M, PAL N, SECAM B, SECAM D, SECAM G, SECAM K,..., Supported video modes: 1080i, 1080p, 480i, 480p, 576i, 720p. Serial interface type: RS-232, USB connector type: Mini-USB B https://www.itproportal.com/reviews/hardware/viewsonic-pjd6683ws-review/ The ViewSonic PJD6683ws is a close cousin to the ViewSonic PJD6553w, and both projectors are built around a DLP chip with a WXGA (1280 x 800) resolution. Where the two differ, in part, is that the PJD6683ws offers a slightly lower brightness rating, at 30... Bright, with a 3000, lumen rating, High quality data image, Short, throw lens, Light enough for portable use Relatively low quality video, Rainbow artifact issues The ViewSonic PJD6683ws delivers a very impressive and bright, high quality data image, and backs that up with a good mono speaker. It's also pretty light, and has a short-throw lens and 3D support, which at this price makes it easier to ignore the devic...