Packaging, Weight, Cable and Feet
Packaging
Along with the mouse, one finds a quick-start guide and warranty card in the rather compact box.
Weight
My scale shows around 86 g (+/- 1 g). ASUS cites a weight of 84 g without the cable, which seems largely accurate. The M3 is neither particularly heavy nor particularly light for its size and has good weight balance to boot.
Cable
The M3 features a regular rubber cable. Its length is 1.80 m (measured). Flexibility is surprisingly decent. The cable has an attached ferrite bead, which helps reduce signal noise.
Feet
The feet on the M3 are black-dyed PTFE (Teflon) feet. Glide is perfectly fine.