Custom split keyboard Zonkey. Compatible with Keyball, Roba, Mona, etc.

Purchased directly from the official store a few months ago.
I was very satisfied with its ease of use, but I am listing it for various reasons.
The product has no defects, and since it was used at home, there is no damage or malfunction.
Key switches and a large trackball are also included, so you can use it immediately upon arrival.
As this is a used item, it is unclear whether manufacturer support is available.

Keycaps: None
Key Switches: Keychron Low Profile Silent Switches

The following is the product description from when it was purchased.
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The firmware is set to JIS, but it depends on your PC settings.
https://github.com/kureyakey/zmk-config-zonkey

A manual for Zonkey's specifications and usage is available on the page above. Please read it before purchasing.

Please pay special attention to the handling of the LiPo battery.

(1) The row-staggered layout is a familiar layout that is also friendly to those who have struggled with layouts like Keyball. (The keymap is set to JIS, but if your PC keyboard is US layout, it will function as a US layout input keyboard.)
*You can assign any key to any position you like.

(2) Zonkey is a keyboard exclusively for low-profile switches.

(3) The typing feel has been improved by incorporating cushioning material and rubber sheets inside.

(4) Trackball Case
*One 34mm trackball case
*One 25mm trackball case are included in the set.

*The trackball case has been changed to a 2mm support ball specification.

(5) Strong magnets are attached to the bottom.

(6) The reset button can be pressed with your finger.

(7) It is wireless and can be used in the same way as the roBa and moNa models.

(8) Top height when keycaps are attached: 23mm. Left side weight: 216g, Right side weight: 222g.

Connection Type: Wireless (Bluetooth)
Keyboard Layout: Reflects your PC settings.