CROSS-COMPUTER CONTROL - Game-changing capacity to navigate seamlessly on three computers. DUAL CONNECTIVITY - Use with up to three Windows or Mac computers via included Unifying receiver or Bluetooth Smart wireless technology HYPER-FAST SCROLLING - Scroll through long documents or web pages faster and easier. Or press the wheel and shift to click-to-click mode for precise navigation ADVANCED ERGONOMIC DESIGN - Perfectly sculpted, hand-crafted shape supports your hand and wrist in a comfortable, natural position RECHARGEABLE BATTERY - Up to 40 days of power on a single charge. You can get enough power for a full day of use in only 4 minutes, with no downtime while recharging CROSS-COMPUTER CONTROL - Game-changing capacity to navigate seamlessly on three computers. Note : In case of Wireless mouse, the USB receiver will be provided inside or along with the mouse DUAL CONNECTIVITY - Use with up to three Windows or Mac computers via included Unifying receiver or Bluetooth Smart wireless technology HYPER-FAST SCROLLING - Scroll through long documents or web pages faster and easier. Or press the wheel and shift to click-to-click mode for precise navigation ADVANCED ERGONOMIC DESIGN - Perfectly sculpted, hand-crafted shape supports your hand and wrist in a comfortable, natural position