Upgrading to the GKU D600 PRO Dashcam

TL;DR 5GHz WiFi and 4K recording

A year later, I'm still conviced that the dash cam is a must-have on the Caterham. 

The GKU D600 has never let me down. But transfer of recorded videos is sometimes painfully slow, especially since you cannot swap to any other app on the phone and really have to watch the progress all along.

As the PRO version was on special on Amazon, as snagged one for the same price as the D600 last year. It's basically the same with those extra features :

• 5 GHz WiFi supposed to be 4 times faster (it is...)
• 4K recording from the front unit even when the rear (full HD) rear camera is connected
• better night sensitivity, although the D600 is a good performer already
• GPS position and speed
• useless 1.47" LCD display
• same everything otherwise
• (added on September 30th 2025) awful sound from the microphone compared to the D600 

Sadly, the adhesive base is not compatible between the two models. My idea of swapping the sliding part of the hinge was really misguided as that's where the GPS module is located. All is fine, I had to open the base to re-route the flexible PCB and I managed to keep everything intact. But don't open it.

So I had to remove the original bracket and replace the transparent "electrostatic" layer, which peels off ok but looks like glued to me. Anyway...  I did mark the original transparent 'electrostatic' film location with adhesive tape to make things easier.

Other than cutting and re-fitting the transparent layer and the new adhesive base, that's an easy job. As the new base is thicker with the GPS inside, it has to be located a bit lower down the rearview mirror than previously.

The provided rear camera is identical to the one from the D600, so I didn't bother replacing it.

My USB-C hard-wired 'smart' power supply is fully compatible too, and was actually from an other generic brand.

I've had to install a new app called "GKU GO", while I was using "JarvisCam" previously. The new app is actually compatible with both cameras, and overall identical with the addition of the GPS and maps functionalities.

Just plug and play then... There was a partial solar eclipse around noon that day, I had lunch then changed the dashcam before going to House of Speed and have a look at the recently freed space for their new showroom.

It's worth the money as video transfers are really snappier, and 4K videos offer more readability of license plates than the ones shot at 2.5K. 

On the other hand, the LCD screen is useless and hidden behind the rearview mirror; I've configured it to power off after 30sec anyway.  GPS is a gimmick, and I don't really need any speed information either. I really miss the "beep" when I lock a video by pressing the side button, the spoken confirmation is not distinctive enough, especially with earplugs on.

As I already have to replace the adhesive velcro that keeps the fuse box cover (and dashcam power supply) in place, I might as well re-route the wiring for the rear camera under the car rather than stuck on one side of the tunnel cover. The length that goes across the rear panel behind the passenger seat is the part I'm not happy with.  (read all about it here)