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 戴尔 M900HD, 900 ANSI流明, DLP, WXGA (1280x800), 700:1, 16:10, 762 - 2032 mm (30 - 80") 戴尔 M900HD. 投影仪亮度: 900 ANSI流明, 投影技术: DLP, 投影仪最佳分辨率: WXGA (1280x800). 光源类型: LED, 光源使用寿命: 3000 小时, 光源使用寿命（经济模式）: 30000 小时. 变焦比率: 固定式, 抛射比率: 1.4:1, 偏移: 105%. 支持的视频模式: 480i, 480p, 576i, 576p, 720p, 1080p. 无线局域网类型: 802.11a, 802.11b, 802.11g