Brand ZIPPY Model ZMS3550 Quantity 1 Color Red + black Material Rubber Connection Method Wired Bluetooth Version No Operation Distance 190 Cable Length cm Tracking Method Optical Resolution 450~5040 dpi OS System Windows XP / Vista / Win7 Other Specifically designed for game; 8 programmable buttons can be customized as macro scripts 5 colors LED to indicate 5 modes 4 LED indicate dpi level; Adopts Avago A9500 laser sensor 4 adjustable dpi level (450 / 900 / 1800 / 3600) Max supports 5040dpi; Built-in memory to store 1000Hz USB return frequency; 4 roller design side face with rubber to supply comfortable feeling; Ergonomic design with 6 PCS 5.8g balance weight; Button service life: left and right is 20 million times others are 5 million ; Mouse engine: Avago A950 laser engine; Power: DC 5V Packing List 1 x Mouse (190cm-cable) 1 x CD 6 x Balance weight CD Content: http://m2.img.dxcdn.com/CDDriver/sku.178455.rar