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 Buffalo BSMBW500M, Right-hand, Blue LED, RF Wireless, 1600 DPI, Black Buffalo BSMBW500M. Form factor: Right-hand. Movement detection technology: Blue LED, Device interface: RF Wireless, Movement resolution: 1600 DPI, Buttons type: Pressed buttons, Buttons quantity: 5, Scroll type: Wheel. Power source: Batteries. Product color: Black