Brand Microkingdom Model M9 Quantity 1 Color Black Material ABS Connection Method 2.4G Wireless Connection Type USB Operation Distance 40cm Tracking Method Optical Resolution 1200 dpi Power Supply 2V x 1.5V AAA battery (Included) Supports System Windows XP Home Edition or Professional Edition / Windows 7 Professional or Ultimate / Windows 8 or Windows 2000 Other 2.4G wireless optical mouseplug-and-play automatic code coupling; Adopt high quality ABS material and Taiwan original phase sensitive IChigh-precision optical tracing engine; Normal use the battery can be used 6 months; Flexible portable and durable;2.4G wireless technology; Ultra-low radiation keeping you healthy; Great hand feeling; Wireless carrier frequency:2402MHz-2480MHz;Wireless channel:16automatic frequency hopping; The mouse rated current: 25mA / 1.5V Packing List 1 x Wireless mouse 2 x AAA battery 1 x Mini USB Receiver