This is a black PCB for the split keyboard Keyball 61 (right-hand ball) with 1N4148W (SMD Diode) chip diodes soldered on. The top plate shown in the photos is also included. The items for sale are the four PCBs (left and right) and the top plates (left and right) shown in the first photo. Items for sale: ⚪︎ Pre-soldered black PCBs (left and right) ⚪︎ Black top plates (left and right, including thumb keys) Soldering was done by a professional at a factory, and we have confirmed that it is perfectly soldered. You can skip the most tedious and detailed work. Recommended for those who want to buy time or are not confident in fine soldering. If you would like soldering for other components on the PCB (excluding LEDs): → 14 jumpers → 44 switch sockets → 2 OLED pin sockets → 2 TRRS jacks → 2 tact switches → L-shaped con-through Please purchase from the following page: https://jp.mercari.com/item/m80039569931?afid=9554910173&source_location=share&utm_medium=share&utm_source=ios Pro Micro x2 and con-throughs OLED display sold separately Please consult separately regarding the trackball reading PCB. The PCBs ordered in the same lot have been tested and confirmed to work with a standard Pro Micro. Keyball has various sizes, such as 39, 44, and 61. The 61 is easy to transition to, feeling like a 60% keyboard, and the trackball is also usable. It's also comfortable to hold, and I recommend it. Keyball is a keyboard created by shirogane and the kit is sold at Yushakobo. Please feel free to consult with me if you need any help with Keyball repairs or soldering services. Thank you. black PCB keychron keybord DIY keyboard Key switch type: Optical Key switch type: Mechanical