The Lenovo Essential USB Mouse is more than your basic mouse. It features an easy plug-and-play connection to PCs via a USB cable. This ergonomic full-size design provides a comfortable grip for all-day comfort. A high-resolution, 1600 DPI optical sensor ensures you'll be gliding smoothly from window to window. Full-size mouse for better grip; Wired USB connection; High resolution of 1600 DPI; Ambidextrous design Features

Specifications
General Information 
Has scroll wheel?: Yes
Mouse Uses: N/A
Wired or Wireless: Wired
Is Ergonomic?: Yes
Mouse Type: Optical
Mouse Size: Full-size
Max Mouse DPI (0 if N/A): 1600
Handedness: Ambidextrous
Peripheral Interface: USB 2.0
# of Mouse Buttons: 3
Operating System Compatibility: Windows
Color (Generic): Black
Model Number: 4Y50R20863