Build Quality

Overall build quality is solid. There is no rattle when shaking the mouse. When applying lateral pressure, minor creaking but no flexing of the shell can be observed. Activating the side buttons by squeezing the sides is possible, but requires significant force. Finally, accidental clicks when slamming down the mouse do not occur.

Buttons

Main buttons on the Viper V2 Pro are very good. There is some pre and post-travel, but button response is very firm and snappy nonetheless. While the two main buttons don't sound exactly the same, they are more uniform than most other optical switch implementations. Despite being visually separated from the shell, lateral button movement is minimal and must be provoked to become noticeable. Button stiffness is medium. A pair of Razer Optical Gen-3 (90 M) switches is used.


Side buttons are excellent. While they do sound somewhat hollow, pre and post-travel are kept to a minimum, resulting in firm and pleasing actuation. The pressure point is even across the entirety of the surface. Button size and placement are very good as actuation is possible easily by rolling one's thumb across. A set of surface-mounted switches (white plunger) from CF (ChangFeng) is used for these.

Underneath the mouse is a single button which either cycles through the set CPI levels if pressed briefly or turns the mouse on or off if pressed and held, which works well.

Scroll Wheel

The scroll wheel is very good. Scrolling up in particular is noisy, but tactility is great, with clearly discernible steps yet no overly stiff scrolling. The encoder comes from Kailh (gray, black core) and has a height of 12 mm. The middle (scroll wheel) click requires medium to high force for actuation. A seemingly unbranded tactile switch is used for this one.

Surface

The Viper V2 Pro has a slightly roughened matte surface. Grip is fine, and it doesn't attract fingerprints, dirt, or the likes too easily. Cleaning may take a while, however, although there are no signs of wear left after doing so. All in all, very good materials.

Button Sound Test

Disassembly

Disassembling the Viper V2 Pro is easy. The screws are located beneath the rear and front skates. The only obstacle here are the screws themselves, which are Torx T6. The top shell is clipped in at the sides and can be dislodged quite easily by wedging in a credit card.

The internal design is remarkably efficient. Everything sits on the main PCB, with the exception of the side buttons clipped into a post and connected to the main PCB through a ribbon cable. Similarly to the Pulsar Xlite Wireless V2, the battery sits on a plastic assembly in the rear part of the shell. The PCB is both packed and very thin, and only a single screw has been used to secure it, along with a clip on the right side. One can also spot a fuel gauge IC on the main PCB. Production date for the side-button PCB is the eighth week of 2022. The MCU is a Nordic nRF52840, whose datasheet can be found here. The Bluetooth capability of the MCU remains unused.


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