【SayoDevice K05 HE Keyboard】This keyboard with 5 Hall magnetic linear switches! TYPE-C,USB 2.0 high-speed 8000HZ. 【Custom Keys And Knob】The Keys and knob can also be set with any key or ctrl/alt/shift + any keys. 【Custom Switches】Professional Game magnetic swithes, Rapid Trigger, 0~4.000mm Custom trigger release. 【Replaceable Switches】3 Swithes available, Supports any hall magnetic switches, Hot-swappable, With a simple click for calibration. 【NOTICE】Sometimes, the keyboard needs to do "CALIBRATION" before use for the first time or after firmware upgrade.