Packaging
Aside from the mouse, one finds a braided charging cable (USB Type-A to Type-C), wireless dongle, and quick start guide inside the box.
Weight
My scale shows around 63 g (+/- 1 g), which is slightly less than the weight cited by Ajazz. For comparison with other similarly sized solid shell examples, the VGN Dragonfly F1 Pro Max weighs 55 g, whereas the Endgame Gear OP1we weighs 58 g, though both come with lower-capacity batteries. An excellent weight.
Cable
The AJ199 4K comes with a paracord-like, braided charging cable (USB Type-A to Type-C). In terms of flexibility, the cable is strictly average, to where playing while charging may feel restrictive. The measured length of the cable is 1.45 m.
Feet
The feet on the AJ199 4K are black-dyed PTFE (Teflon) feet. They are of average thickness, and glide is decent. The ring around the sensor ensures CPI stays consistent upon applying vertical pressure.