Cisco Headset 561, Wireless Single On-Ear Digital Enhanced Cordless Telecommunications Headset with Standard Base for US and Canada, Charcoal, 1-Year Limited Liability Warranty (CP-HS-WL-561-S-EU=) 16 Mouse Scrolling directions Vertical Number

Cisco Headset 561, Wireless Single On Ear Digital Enhanced Cordless Telecommunications Headset with Standard Base for US and Canada, Charcoal, 1 Year Limited Liability Warranty (CP HS WL 561 S EU=) 16 Mouse Scrolling directions Vertical Number Mouse Scrolling directions Vertical Number of scroll wheels 1 Silent click Yes Movement resolution 3200 DPI Buttons type Pressed buttons Buttons quantity 5 Scroll type Wheel Movement detection technology Optical Device interface USB Type A Purpose Office Design Material Plastic Surface coloration Monochromatic Product colour Black Ergonomic design Yes Form factor Right hand Ergonomics Works on any surface Yes Power Power source Cable System requirements Mac operating systems supported Mac OS X 10 1 cm (15") 1024 x 768 pixels XGA LED Touchscreen Multi user Black