Lot Of 10 Pieces Optical USB Scroll Mouse Black. This USB mouse is maintenance free! The optical tracking provides accurate response at 400 dpi and you will never have to clean the mouse ever again! The ergonomic design and 3-button layout will have you working comfortably and efficiently.

Specifications:

USB Optical Scroll Mouse
Black casing
USB interface
Scroll wheel acts as third button
Ergonomic design
400 dpi
700 mm per second tracking speed
5-foot cord (approximate)

Regulatory Approvals:
FCC
CE