Adopts AVAGO optical sensors, precise positioning, stable performance. Button rated at more than 10 million clicks. High-precision: 1000 dpi. OS compatibility: Microsoft"s Windows 98, Me, 2000, XP, Vista, 7; Linux; Apple"s Mac OS (Mac 9.01 and above version). Certificates: FCC and CE. Safe and environmentally-friendly. (RoSH, PAHs, and REACH standard).