Build Quality

Overall build quality is solid. When shaking the mouse violently, a faint rattle comes from an indeterminable location. When applying lateral pressure, no creaking or flexing of the shell can be observed. Activating the side buttons by squeezing the sides is impossible. Lastly, accidental clicks when slamming down the mouse do not occur.

Buttons

Main buttons on the Series 2 Pro Wireless are good. Pre and post-travel are moderate, resulting in a fairly firm and snappy button response nonetheless. Being visually separated from the shell, button movement is moderate when provoked. Button stiffness is medium to light. A pair of optical switches from RAESHA (100 M) are used.


Side buttons are very good. Both pre and post-travel are low, though button response isn't particularly satisfying. The actuation point is even across the entirety of these. Button size and placement are good, as actuation is possible rather easily by rolling one's thumb across. A set of surface-mounted switches from Huano (beige plunger) are used for these.

At the top of the mouse is a button for cycling through the set CPI levels, which feels decent. A Huano switch (green plunger) is used for this one. A simple on/off slider is found at the bottom, which works fine.

Scroll Wheel

The scroll wheel is good. Noise levels are appreciably low, though tactility is merely average, as the individual steps mostly lack separation. The encoder comes from F-Switch (yellow, green core) and has a height of 10 mm. The middle (scroll wheel) click requires medium force for actuation. An elevated Huano switch (green plunger) is used here.

Surface

The Series 2 Pro Wireless has a matte surface all over. Grip is fine, and it doesn't attract fingerprints or dirt too much. It is easy to clean, and there are no signs of wear left after doing so. All in all, excellent materials.

Button Sound Test

Disassembly

Disassembling the Series 2 Pro Wireless is very difficult. First, the two rear skates along with the screws underneath them need to be removed. Second, the rear top shell needs to be cautiously removed, which can be very challenging, giving access to two downward facing screws towards the rear. Next, the main button pieces need to be dislodged, which is most easily done by identifying the hooks inside and pushing against them, in turn giving access to another set of downward facing screws towards the front. Finally, the clips at the sides and front need to be dislodged, which is relatively easy.

The internal design is fairly efficient. The side buttons are slotted vertically into a plastic assembly part of the bottom shell and connected through a 3-pin connector to the main PCB, while the battery is slotted vertically towards the rear. Everything else sits on the very thin main PCB, which has been affixed to the bottom with three screws. Two MCUs are used: A WCH CH32V307 RCT6, which provides a USB high-speed PHY and whose datasheet can be found here, along with a Nordic nRF52840 for wireless communication, whose datasheet is found here. The Bluetooth capability of the latter chip remains unused. The production date for the side-button PCB is the 11th week of 2024.


As for the soldering and general quality of the PCB, I'm unable to find any noteworthy flaws.