Packaging

Aside from the mouse, one finds a quick start guide, warranty guide, AA-battery, and AAA-battery along with a converter in the box.

Weight

As the M4 Wireless can be operated with either a single AA or AAA-battery, the weight changes accordingly. Without any battery inserted, my scale shows around 62 g (+/- 1 g). With an Alkaline AAA-battery along with a converter (both included), the weight goes up to 77 g, while the included AA-battery brings the weight up to 85 g. Aside from the last one, these numbers are exactly in line with those cited by ASUS. For comparison, the SteelSeries Rival 3 Wireless with a single Alkaline AAA-battery installed weighs in at 96 g, while the Razer Orochi V2 too equipped with an Alkaline AAA-battery comes out at around 68 g. In short, while the M4 Wireless easily beats the Rival 3 Wireless in this department, the (much smaller) Orochi V2 emerges on top.

As the M4 Wireless lacks a wireless extender, the wireless dongle needs to be plugged directly into a USB port. When doing so, as per Intel's documentation, it is strongly recommended not to use a USB 3.x port, as ports of this type may introduce interference adversely affecting wireless operation. A storage compartment for the wireless dongle is located right next to the battery slot.

Feet

The feet on the M4 Wireless are white-dyed PTFE (Teflon) feet. They are of average thickness and glide very well. The ring around the sensor ensures CPI stays consistent upon applying vertical pressure.