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 DELL S320, 3000 ANSI lumens, DLP, XGA (1024x768), 2200:1, 4:3, 798,8 - 7620 mm (31.4 - 300") DELL S320. Projector brightness: 3000 ANSI lumens, Projection technology: DLP, Projector native resolution: XGA (1024x768). Light source type: Lamp, Service life of light source: 3000 h, Service life of light source (economic mode): 4000 h. Zoom ratio: Fixed, Throw ratio: 0.62:1, Offset: 115%. Analog signal format system: NTSC, PAL, SECAM, Supported video modes: 1080i, 1080p, 480i, 480p, 576i, 576p, 720p. Serial interface type: RS-232, USB connector type: Mini-USB B https://www.itproportal.com/reviews/hardware/dell-s320wi-review/ Short-throw interactive projectors like the Dell S320wi are best understood as less expensive, but nearly as good, alternatives to ultra-short-throw models. For any given size image, you can't put them as close to the screen as with ultra-short-throw proj... Shortthrow projector, It's relatively light, Interactive mode, No calibration needed Brightness drops in interactive mode, Rainbow artifacts with video Overall, if you need an XGA interactive projector, the Dell S320wi offers a lot to like, with its short-throw and its level of both data and video image quality. It also does well when it comes to some common problem areas such as posterisation and shad...