Packaging, Weight, Cable, and Feet
Aside from the mouse, one finds a quick start guide and USB Type-A to Micro-USB cable in the box. The cable is wrapped around an oval to ensure no kinking.
My scale shows around 69 g (+/- 1 g), which is exactly in line with the weight cited by SteelSeries. An excellent weight, especially when considering its medium size and that the Prime lacks externally visible holes. Compared to several of its right-handed ergonomic peers, such as the ASUS ROG Gladius III at 76 g or ROCCAT Kone Pro at 64 g, the Prime does well.
The Prime comes with a paracord-like, detachable USB Type-A to Micro-USB cable. It's way more flexible than the Rival 5 cable and beats the Aerox 3 Wireless charging cable as well, but can't quite compete with the likes of Endgame Gear XM1r or HyperX Pulsefire Haste. Though the cable lacks an anchor for further stabilization, the connector sits tight, and I didn't experience any disconnects during play. The Micro-USB connector is triangle-shaped, preventing cross-compatibility of other cables with the Prime and vice versa. Its measured length is 2 m.
The feet on the Prime are black-dyed PTFE (Teflon) feet. Glide is perfectly fine. The ring around the sensor ensures CPI stay consistent upon applying vertical pressure. Indents next to the feet make them easier to remove.