From Manufacturer
The black USB Optical Silent Click Mouse from Macally is a wired USB mouse with two buttons for pointing and clicking. A built-in scroll wheel allows you to page through web pages and documents with ease and acts as a third button. This mouse has a dpi switch button that allows you to switch between sensor resolutions of 800, 1200, 1600 and 2400 dpi so you can set the tracking speed and precision to your preference. It's plug and play so you won't need to install any drivers. The 5' long cable allows you to connect the mouse to your PC and MAC via a USB Type-A port.
Silent soft-click buttons and scroll wheel for silent and smooth control
800/1200/1600/2400 dpi switch button to adjust sensitivity for more precise control
5' long USB cable to connect to computer
Ambidextrous design
Plug and play
Compatible with Mac and PC
UPC: 701107497648