Notebook mouse with 2.40 GHz technology from Logi Link with optical sensor & up to 800 dpi scanning for high precision & fast operation. The connection is done via the supplied USB (Universal Serial Bus) Micro dongle & it the mouse is automatically detected by Autolink function. The Mini dongle can be tucked in the mouse during transportation. In addition to optical scanning & vertical scrolling wheel, the Logi Link Notebook Mouse has 5 programmable buttons.