Mechanical Switches - Ideal for a smooth and quieter typing experience, Gateron Red mechanical switches are the go-to for versatility. Dual Bluetooth & USB Interface - Connect via Bluetooth or USB. When USB mode is selected, simply connect the included USB-C cable to the computer and type away. 21 Backlight Modes - With 21 backlight modes to choose from, you can pick from a variety of different light settings for the perfect visual experience. Mac & PC Compatible - Built to fully support both Mac & PC interfaces. The IZO comes with hybrid Operating System keycaps which display both OS icons. Never-Fading Keycaps - Our custom PBT double-shot keycaps include laser-etched font so the keys will never fade away with time and usage. Water Resistance Level: Not Water Resistant