Logitech Ergonomic Wireless Trackball Mouse, Easy Thumb Control, Smooth Tracking, Black

Ergonomic comfort design, relaxed hand, and arm: The comfortable, sculpted ergonomic shape of this mouse naturally fits your hand Convenient controls: Moving between documents or browsing your favorite websites is a breeze with the ergonomic mouse's large, easy-reach back and forward buttons and the precision scroll wheel Mouse design includes sculpted post-consumer recycled plastic: It uses 50% for the black and 21% for the off-white; also uses FSC-certified paper for responsible packaging Up to 24 months of use from a single AA battery with the USB receiver; you may even forget your Logitech wireless trackball uses batteries at all Optimal for tight workspaces: Because the trackball doesn't move, it’s excellent for tight workspaces and busy desks and fits in seamlessly alongside your computer and keyboard or Portable computer Two ways to connect and multi-OS: Connect simply with Bluetooth or the USB receiver and never worry about drop-offs or lag up to a 10m (33 ft) range Smooth thumb control: Track precisely with great cursor control on any surface and easy thumb-operated trackball and adjust the cursor speed with Logitech Options software