This is an Infinity ErgoDox Ergonomic Keyboard Kit, purchased from the Infinity ErgoDox official website around 2016, and assembled and soldered. I used it for about 1-2 years after purchase, and then stored it without use. Before listing, I confirmed that it can perform all key inputs when connected to a MacBook. Included accessories are two USB cables and spare parts (see photos). Only what is shown in the photos is included. One of the cables is not the original cable, but an Anker cable, but it works without any problems (it should work if it's USB A to USB C). Connection Notes: - PC connection side: USB A (USB C adapter can also be used) - Keyboard side: USB C - Keyboard-to-keyboard connection: USB A (left) - USB C (right) cable Please note that I do not provide support for PC compatibility or keymap customization.