This is the GR-Trackpad65 experimental kit (DIY trackpad) from Usaki-bo-do. It is pre-assembled and uses Kailh Choc V2 Deep Sea silent tactile key switches. Please be aware that this was assembled by an amateur. --- Additional Information It's a great product, but I couldn't get used to it and haven't used it much since assembling it. I'm selling it to someone who can use it, as I'm not using it. The cursor sometimes jumps slightly when using the trackpad. The trackpad is attached with double-sided tape according to the build guide, and it seems that the jumping phenomenon is likely to occur at the edges of the tape. I've used the same tape as the one in the build guide and applied it without any gaps. Also, it's hard to see in the photos, but I've taken measures to prevent the USB port on the microcontroller from breaking. Kailh Deep Sea low profile Choc V2