Model Number: dwm93 Key Specifications/Special Features: Extreme comfort - slim ergonomic design and smooth frosted surface for an incredible user experience.Noiseless, quieter and easier to click.Plug & play - tiny wireless receiver conveniently slots into your computer's USB port, taking up minimal space.Stable connection - 2.4GHz wireless provides a powerful, reliable connection up to 15mUniversal compatibility - work with Windows XP, Windows Vista, Windows 7, Mac OS X 10.4Portable & durable - USB-receiver stays in your PC USB port or stows conveniently inside the wireless mouse when not in use.Perfect for work and entertainment in home or office.