1. Connect Up to 4 Devices 1 wired + 3 Bluetooth connections for seamless switching and higher productivity. ^^ 2. Multi-System Compatibility Works with Android, Windows, and iOS. Includes 12 multimedia hotkeys for music, brightness, and more. ^^ 3.1500 mAh Battery Single-color backlight runs up to 3 hours at full brightness. ^^ 4. Blue Switch & Hot-Swappable Enjoy crisp tactile feedback with the freedom to swap switches and customize your typewriter keyboard. ^^ 5. Adjustable Stand Design Three height levels with non-slip rubber pads for stable and comfortable typing.