O3C OSU SayoDevice Keyboard: This keyboard features three Hall effect linear switches, a knob, and a screen! It features a Type-C port and USB 2.0 high-speed 8000Hz.Replaceable Switches: Supports any Hall effect linear switch, with one-click calibration.IPS Color Screen: Equipped with a 0.96-inch IPS color screen with a 160*80 resolution, the key range and key count are clearly visible.Customizable Screen: The first line of text on the screen can be customized, such as entering your own ID.Customizable Knob: The knob can also be set to any button, such as scrolling through a playlist.Note: Sometimes, the keyboard requires calibration before first use or after a firmware upgrade (steps are shown in the image). Pressure: 30-50gf