Packaging
Aside from the mouse, one finds a USB Type-A to Type-C charging cable, wireless extender, wireless dongle, sticker, and quick start guide in the box.
Weight
My scale shows around 57 g (+/- 1 g), which is exactly in line with the weight cited by Glorious. For comparison, the larger RGB-free and hole-free Razer Viper V3 Pro weighs 54 g, whereas the similarly-sized and likewise RGB and hole-free Endgame Gear OP1we weighs 58 g. A very good weight.
Cable
The Model O 2 Mini Wireless comes with a paracord-like, braided charging cable (USB Type-A to Type-C). An anchor at the mouse-end of the cable ensures the cable not coming loose during use, although it also prevents one from plugging in the connector in either orientation. In terms of flexibility, this one is roughly on par with the regular "Ascended" cable on the latest Glorious wired mice. Accordingly, the Model O 2 Mini Wireless can be used as if it were a wired mouse with barely if any perceivable difference in terms of handling. Its measured length is 2 m, and a ferrite bead is attached.
The charging cable also functions as an extension cable, if used in conjunction with the wireless extender. The wireless extender can be used to keep the distance between dongle and mouse as short as possible.
Feet
The feet on the Model O 2 Mini Wireless are white-dyed pure PTFE (Teflon) feet with slightly rounded edges. Glide is very good and thickness above average.