Brand New 78-Key Multi-Device Wireless Keyboard Rechargeable for PC Laptop Multi-Device and Multi-OS Wireless: Seamless switching between 4 devices such as laptop, desktop computer, tablet or smartphone without hassle of swapping and reconnecting the keyboard back and forth. Quiet and Comfortable: Featuring RAPOOs classic blade-series ultra-thin design, E9050L delivers a fluid, precise and quiet typing experience at a natural angle for your wrist --- thanks to its 0.2-inch thickness that contributes less wrist strain, making extra palm rest no longer needed. 78-Key Compact Layout: Space-saving and portable, easy to carry in your bag or backpack, great for school, travel, and business. The 12 multimedia hotkeys provide quick access to most widely used functions such as play/pause, volume +/-, email --- Windows and Mac OS dual-system supported. Rechargeable with 90-Day Battery Life: