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 Battery powered Batteries Mouse ambidextrous Ambidextrous HP Wireless Optical (Biscotti) Mouse, Ambidextrous, Optical, RF Wireless, 1750 DPI, Bronze HP Wireless Optical (Biscotti) Mouse. Form factor: Ambidextrous. Movement detection technology: Optical, Device interface: RF Wireless, Movement resolution: 1750 DPI, Buttons quantity: 3, Scroll type: Wheel. Power source: Batteries. Works on any surface. Product color: Bronze