O3C OSU SayoDevice Keyboard with 3 Hall magnetic linear switches, 1 knob, and 1 screen. Equipped with TYPE-C USB 2.0 high-speed 8000Hz polling rate. Features replaceable switches that support any Hall magnetic switches, allowing simple calibration with a click. Includes a 0.96-inch IPS color screen with 160x80 resolution, displaying visible key range and button counting. The first line of text on the screen is customizable, such as entering your own ID. The programmable knob can be assigned to any function, such as scrolling through a song list. Note: Calibration may be required before first use or after a firmware update. Refer to the provided instructions for calibration steps. Note: Due to variations in lighting and screen settings, the actual item color may slightly differ from images. Slight dimensional differences may occur due to manual measurement.