Features: brand new and high quality Quantity:1PC. 3 buttons, including scroll wheel, left button, right button. It adopts ergonomic design which is suitable for most people's hand feeling and ensures you cannot feel fatigued after working for a long time. Compatible for Windows 98 / XP / Vista / 7 / 8 or latest. Intelligent connectivity, no need to code, plug and play. Specifications: Connection way: USB cable DPI: 1200dpi Color: purple , black (optional) Supported system: Windows 98/XP/Vista/7/8 Cable length:approx. 100cm/39.37in Super mini size: approx. 9x5x3cm/3.54x1.97x1.18in Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x 3D Wired Optical Mouse