Product Details of A4Tech OP-720 USB Optical Wheel Mouse (Black): • 1,000 DPI (New Version) • Mouse Type: Optical Wired • Connector Type: USB • 2 buttons plus scrolling wheel optical mouse • Works on most surfaces with precise optical sensor • Comfortably shaped for any hand size ; Cable 1.5mt length • Operating System: Windows 2000/XP/2003/Vista/7/8/10 • Classic Optical Mouse simple and yet proven efficient WHAT'S IN THE BOX: • 1 x A4TECH Mouse ------------------------------------------------------------------------------------ WARRANTY: • 1 Year Warranty • For availing warranty, kindly send us a private message for further assistance.