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 PJD5555W, 3300 ANSI lumens, DLP, WXGA (1280x800), 4:3, 762 - 7620 mm (30 - 300"), 4:3, 16:9 Viewsonic PJD5555W. Projector brightness: 3300 ANSI lumens, Projection technology: DLP, Projector native resolution: WXGA (1280x800). Light source type: Lamp, Service life of light source: 5000 h, Service life of light source (economic mode): 6000 h. Digital zoom: 2x, Optical zoom: 1,1x, Throw ratio: 1.55 - 1.7:1. Analog signal format system: NTSC 3.58, NTSC 4.43, NTSC M, PAL B, PAL D, PAL G, PAL H, PAL I, PAL M, PAL N, SECAM B, SECAM D,.... Serial interface type: RS-232, HDMI connector type: Full-size, USB connector type: Mini-USB B http://www.digitalversus.com/video-projector/pjd5555w-p27613/test.html The PJD5555W is made from black plastic with a finish that imitates brushed metal. Despite being a pretty standard size (12.4" x 9" x 4.1" / 316 x 228 x 103.7 mm), it's actually pretty light (just 4.85 lbs / 2.2 kg). There's an air vent on the right and o Good brightness, Convincing 3D, Input lag doesn't affect gaming (33 ms) Disappointing colorimetry, No 1080p, Poor contrast The PJD5555W and its low price will only appeal to businesses who need something for presentations and to gamers who want to have a huge display for multiplayer gaming. The black density and colorimetry rule it out straightaway for home cinema use...