Sound Control Wheel & WIN /MAC compatibilityThe keyboard comes with a unique sound control wheel that precisely adjusts the volume without interfering with your workflow. Scroll up to increase volume, scroll down to decrease volume. Before use, select MAC Mode or Win mode on the keyboard according to the system. The keyboard supports WINDOWS XP/7/8/10/11 and MAC. Linear switch & Hot-Swappable Custom KeyboardThis custom mechanical keyboard base is hot-swappable and supports 3-pin or 5-pin switch replacement. Even keyboard beginners can easily DIY their own keyboard. The WomierF87 mechanical keyboard is equipped with a pre-lubricated linear axis switch for smooth typing and pleasant mechanical sound, providing fast response for your games. Walnut Pattern Theme &PBT keycapSide printing keycap keyboard is a new trend in the world at present. These side-carved PBT keycaps use dual injection molding and thermal sublimation processes to be more durable, colorproof, sweat resistant,