Software

There is no dedicated software driver support for the Ajazz K620T 2.0 keyboard at this time—all functionality is hardware based. As such, I have chosen to combine the Software and Performance pages into one. We may see something in the future, but the company has not confirmed or denied anything yet.

Performance

The Ajazz K620T V2.0 keyboard supports the typical 6-key rollover Bluetooth and NKRO in USB wired mode, which tested successfully using Aqua's test. Switch Hitter confirmed no chatter with these keys either, and as is usually the case with most mechanical keyboards today, the right Win key is replaced by an Fn key.

Also, if you thought the R. Ctrl and Fn keycaps have mistakenly been switched around, the answer is no. The Fn key is actually at the end of the row, with R. Ctrl between the menu and Fn keys. This may seem like a small change, but I am used to hitting the penultimate key to access all the Fn+ layer functions on keyboards, which made it a big adjustment that resulted in confused downward glances over the course of the first two days before it became less of an issue. This was probably made worse by my testing of multiple smaller form factor keyboards at the same time—I do not expect the average user to have this issue.

Ajazz does have a lot of pre-programmed functions here, which is make-or-break for smaller form factor keyboards, especially as there was no software support at the time of testing. Most are associated with the Fn key, which is why I made sure to draw attention to its position above. The programming is the same as with the original K620T, and the manual does a good job going over this. These include the Fn key row associated with the number key row, Tilde (~) on Esc, and Delete with Backspace. The other functions are for media playback since the volume wheel does volume control in addition to muting/unmuting if pressed down, and arrow keys. Then we have the onboard lighting controls, including a toggle between 19 different effects, the direction and speed of applicable effects, and the brightness of the lighting in seven steps (0, 16.5, 33, 50, 66.5, 83, 100 %). You can also completely swap the Fn row and number key row using Fn + L.Ctrl if needed, and holding Fn + space for 4–5 seconds does a factory reset.

There are four indicator LEDs here, with only the first one the standard Caps Lock. The other three do not include Num Lock or Scroll Lock indicators for obvious reasons. Instead, we have a Bluetooth pairing indicator, a battery charging indicator, and a low battery warning. It is obvious that the Ajazz K620T 2.0 was designed with wireless connectivity in mind foremost, especially with its slot for mobile devices. We also get newer Bluetooth 5.0, and given there are not many devices supporting Bluetooth 5.1/5.2 at this time, this is plenty enough. As it stands, I had a rock-steady connection across all test clients. If backlighting is turned off, Ajazz claims a battery life of up to 880 hours. I will agree as I saw no reason to charge the keyboard, mostly because the backlighting here is not very functional since the keycaps do not support it well anyway. With the lighting on at 100% brightness in a static effect, battery life drops into the single digits (in hours) more often than not, with charging taking about the same amount to time.


Here is what I meant: The backlighting is really better described as lighting in general. There are only two static lighting effects, including the default blue, and I can see this being fine in wired mode, or just in a pinch in wireless mode if needed. But the other 17 effects are all dynamic or type-reactive, more for show than to actually have the keycaps lit.


The switches were another point of confusion for me initially since the webpage for the original Ajazz K620T shows Firstblood Blue and Pink switches with rated actuation force and travel numbers. According to this page, the Firstblood Pink is a linear switch that actuates at 1.5 mm and 40 gf on average. The switches on my sample are indeed linear; however, average actuation was closer to the usual 2.0 mm and heavier at ~55 gf. Just before I started writing this section, I got the official specifications for the switches from Epomaker seen above. As you can see, the specifications here are identical to my own findings. This means that the older specifications are either incorrect or Ajazz has changed switches with the K620T 2.0. Converting the switches to be hot-swappable may mean Ajazz changed things based on user feedback for the previous version, but regardless, the currently used Ajazz Firstblook Pink is a medium force, linear switch that feels pretty good in use. There are other linear switches I like more, but to me, this one feels better than the mainstream Cherry MX Red and other direct clones. A fairly smooth travel coupled with consistent actuation already makes this better than the average linear switch, and a slightly heavier actuation force results in fewer accidents if you are a heavy typist or rest your fingers on the keys. Lastly, the stated 2.0 mm rated travel distance refers to the travel distance for actuation, the total travel distance is 4.0 mm.


As always, the sound of a keyboard is based on more than just the switch type. So when comparing sound clips, consider the keyboard as a whole. In this case, I have provided above an example sound clip of me typing on the Ajazz K620T 2.0 keyboard sample at ~75 WPM as it comes out of the box with the Ajazz Firstblood Pink switches. For context, you can find sound clips from other keyboards here, including those with linear switches. I did bottom out during recording, and you can also hear the ping off the steel plate that may not be to your liking.