Pair with, and quickly switch between 4 devices via Bluetooth or the included USB dongle. M+ Cross-Computer Technology: Seamlessly use and control multiple computers by moving the cursor to the edge of your screen, automatically switch between screens to finish multi tasks at the same time. Wireless transferring files between computers - just copy on one computer and paste to the other, eliminating the need of cloud services, emails, or USB flash drive. Long-Lasting Battery Life: 800mAh li-po battery, USB-C quick charge, lasts up to 90 days. Comfortable: Fits all grips and hand sizes, especially for people with bigger hands. Its good ergonomics make the wireless mouse easy on hard-working wrists, the matte finish is comfortable for heavy uses on daily basis. 11 Programmable Buttons: Assign shortcuts, media keys, or macros to streamline your work and boost efficiency. Works On Most Surfaces: Adapts hi-performance sensor, provides more precise tracking on most surfaces.