Build Quality

Overall build quality is very 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 impossible. Lastly, accidental clicks do not occur when slamming down the mouse, unless the debounce time is set to 0 or 1 ms.

Buttons

Main buttons on the Atlantis 4K are very good. Pre-travel is moderate, but post-travel fairly low, resulting in a fairly firm and snappy button response. While the buttons are visually separated from the shell, lateral button movement is minimal and needs to be provoked. Button stiffness is medium. A pair of Huano switches (blue shell, pink plunger) is used for these.


Side buttons are excellent. Pre-travel is very low and post-travel low, resulting in a snappy and pleasing button response. The pressure 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 Huano switches (white plunger) is used here.

At the bottom of the mouse is a single button for cycling through the set CPI steps, which feels fine. A seemingly unbranded tactile switch is used for this one. In addition, a simple on/off-switch is present, which works fine.

Scroll Wheel

The scroll wheel is good. Noise levels are high, but tactility is quite good, providing decently separated steps and controlled scrolling. The encoder comes from TTC (white or "silver") and has a height of 9 mm. The middle (scroll wheel) click requires high force for actuation. Another switch from Huano (white plunger) is used for this one.

Surface

The Atlantis 4K has a chalky matte surface all over. Grip is fine, and it doesn't attract fingerprints or dirt too much. It is fairly easy to clean, and there are barely any signs of wear left after doing so. All in all, good materials.

Button Sound Test

Disassembly

Disassembling the Atlantis 4K is easy. The screws are located beneath the front and rear skates. The sides are additionally locked in with clips, which are fairly easy to dislodge.

The design differs from most others. The side buttons sit on a rather large PCB elevated above the main PCB, accompanied by the battery and connected to the main PCB through a ribbon cable. All PCBs are very thin and have larger cutouts and holes to save additional weight, and the side-button PCB is positioned such that it aids in ensuring structural integrity. Three screws are used for the former and an additional four screws for the main PCB. The MCU is a Nordic nRF52840, whose datasheet is found here. The Bluetooth capability of the chip remains unused. Production date for the side-button PCB is the 10th week of 2023.


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