ELECOM Wired Easy Thumb Control Trackball Mouse, Sculpted Ergonomic Design,

FUNCTIONAL 6 BUTTONSYou can assign favorite function to each button by using 'ELECOM Mouse Assistant' ELECOM Mouse Assistant Software will be available to download from ELECOM NET website. EASY MAINTENANCEThe ball rolls on three 2.5 mm large artificial ruby ball bearings.

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