This is a good product.  The curved, right-handed shape lets you work comfortably for hours, while the compact design and up to two years of battery life1Battery life may vary based on use and computing conditions. Give you the freedom to take your work anywhere. The five programmable buttons, dual connectivity,  and multi-device flow boost your productivity so you can perform at your best — anywhere you want.M585 brings navigation and efficiency to the next level. The micro-precise scroll wheel packs more grooves per millimeter, making scrolling through long web pages faster and more precise. The tilt wheel offers easy horizontal side-to-side scrolling through web pages, large spreadsheets, or images. This ergonomically designed mouse supports your palm comfortably for long hours. The M585 Multi-Device Wireless Mouse is powerful, precise,  and silent. Curved, right-handed shape offers great palm support so you can work comfortably for hours. Soft, rubber grips on the side and scroll wheel provide excellent control.  Connect to your Mac or PC computer, laptop, or tablet with Bluetooth technology or the USB receiver. Enabled with Flow, this mouse lets you move the cursor across two computers and seamlessly move text, images, and files from screen to screen. Easy-switch lets you pair your mouse to up to two devices and switch between them with a click. Micro-precise scroll wheel packs more grooves per millimeter to make scrolling through long web pages faster and more precise. Tilt wheel offers easy side-to-side scrolling through web pages, large spreadsheets,  or images.