Enjoy the precision and accuracy of optical technology. This mouse eliminates the mechanical ball and need for a mousepad, while the integrated wheel lets you scroll through documents and Web pages at the touch of a finger. Main Features Manufacturer: Lenovo Group Limited Manufacturer Part Number: 06P4069 Manufacturer Website Address: http://www.lenovo.com/us/en/ Product Name: Wheel Mouse Optical 06P4069 Mouse Packaged Quantity: 1 Product Type: Mouse Pointing Device Connectivity Technology: Wired Pointing Device Wireless Technology: Not Applicable Movement Detection: Optical Scroller Type: Scroll Wheel Pointing Device Host Interface: USB Color: Stealth Black Dimensions: 1.25" Height x 2.13" Width x 4.50" Depth Weight: 3.20 oz Package Contents: 1 x mouse cable Standard Warranty: 1 Year Limited