SayoDevice O3C KeyboardThis keyboard with 3 Hall magnetic linear switches, 1 knob, 1 screen! TYPE-C,USB 2.0 high-speed 8000HZ. Custom ScreenWith 0.96 inch IPS color screen,160*80 Resolution, Visible key range and button counting, Support custom animations. Custom Keys And KnobThe Keys and knob can also be set with any key or ctrl/alt/shift + any keys. Custom SwitchesProfessional Game magnetic swithes, Rapid Trigger, 0~4.000mm Custom trigger release. Replaceable Switches3 Swithes available, Supports any hall magnetic switches, Hot-swappable, With a simple click for calibration. NOTICESometimes, the keyboard needs to do "CALIBRATION" ( The steps are shown in the figure ) before use for the first time or after firmware upgrade.