Mccool 2.4G Wireless Bluetooth Vertical Ergonomic Optical Mouse Ergonomic Design w/ 5 Buttons + Built-in Lithium-ion Rechargeable Battery + 1200 DPI Compatible Windows XP 7 8 NT XP Vista Mac 100% brand new and High quality 2.4GHz Wireless Connectivity (USB receiver & rechargeable mouse usb cable included) User convenience with wow-pen's signature, pen-grip comfort. Button: 4 buttons in default/1 scroll wheel (middle button) You pick the hand position that best suits you. Plug and play, compatible with Mac and PC