Build Quality

Overall build quality is solid. When shaking the mouse, there is a slight rattle from the scroll wheel. When applying lateral pressure, no creaking of the shell can be observed. Lastly, when slamming the mouse down, no accidental clicks can be observed.

Buttons

Main buttons on the DM4 Evo are very good. Pre-travel is very low and post-travel is low, which results in a firm and satisfying click feel. Since the clicks are separated from the main mouse body, slight button movement can be felt when pressing down, but it's barely noticeable. Button stiffness is light. Huano switches (blue shell, white plunger) are used for these.


Side buttons are excellent. Both pre and post-travel are virtually nonexistent. The pressure point is even across the entire button, and the click feel is satisfying. Button size and placement is quite good as actuation is possible rather easily by rolling one's thumb over these. Two unbranded square switches are used here.

At the top of the mouse are two buttons for cycling up and down through the set CPI levels. Their click feel is very good as well. Huano switches (black shell, white plunger) are used for these. At the bottom of the mouse is an on/off-switch, which serves absolutely no purpose on a wired mouse.

Scroll Wheel

The scroll wheel is good. It's fairly loud when scrolling up, but quiet when scrolling down. The individual steps are fairly well defined, resulting in medium tactility. The middle (scroll wheel) click requires medium force for actuation. Yet another Huano switch (black shell, green plunger) is used for this one.

Coating

The DM4 Evo has a black UV matte coating on the top and a slightly rougher black matte coating on the sides. In both cases it's very grippy and doesn't attract fingerprints, dirt, or the likes too much. It's easy to clean, and there are no signs of wear left after doing so. All in all, an excellent coating.

Button Sound Test

Disassembly

Disassembling the DM4 Evo is very straightforward. Remove the two top feet, the two bottom feet, and the four screws underneath. The top shell should then come off without any issue. The interior design is impressively simple. Everything sits on a single PCB, including the side buttons, which are mounted directly onto the PCB. LEDs are positioned at the back, on a small elevated PCB that illuminates the scroll wheel, and around the whole PCB. The PCB is affixed to the bottom shell by only two screws, but since it's also embedded into the bottom plate, stability is sufficient nonetheless.


In the top-shell picture, we can see where most of the weight is coming from: a decent amount of plastic has been used in the construction. I wouldn't call it excessive though, so that's not a criticism. PCB thickness, on the other hand, is above average and surely excessive. Going with a thinner PCB would've been a viable solution to save a couple of grams. The MCU is a Bayi BY8832. I do not have any further information on this part.

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