Packaging, Weight, and Feet
Much like the Rival 3, the Rival 3 Wireless resides in a remarkably small box. Inside, one finds the mouse, a quick start guide, and two AAA-batteries (Duracell OEM).
Speaking of which, the Rival 3 Wireless can be operated with one or two AAA-batteries. When using only a single AAA-battery, battery life will be less than 50% of the full configuration. As described in the included leaflet, the battery cover needs to be disengaged by pulling down. Any other method will not work.
As mentioned above, the Rival 3 Wireless can be operated with one or two AAA-batteries. Without any batteries installed, my scale shows around 85 g (+/- 1 g). With a single AAA-battery installed, weight goes up to 96 g. Finally, with two AAA-batteries, the Rival 3 Wireless weighs in at 107 g. Although the two-battery configuration offers considerably better battery life, I much preferred running the Rival 3 Wireless with just a single AAA-battery. At 107 g, the Rival 3 Wireless does feel heavy, but not as much so at 96 g, which is only roughly 5 g more than what the old Rival 100 weighed. In its single-battery configuration, the battery will be slightly off-centered either to the left or the right, but I wasn't bothered much if at all by the resulting shift in weight balance. There is some potential to further save weight by using Lithium AAA-batteries instead of the regular ones.
The feet on the Rival 3 Wireless are standard black-dyed PTFE (Teflon) feet. They are of average thickness and glide decently well. Small indentations next to these make them easy to remove.