Exceptional Comfort: Standard keyboards force you to hold your wrists and arms at angles that can cause discomfort or pain in your hand, arm, or shoulder. With Nulea ergonomic wireless keyboard, it can help you position your body more properly, with your shoulders relaxed and can reduce the risk of fatigue and injury by its split, splayed and curved design. Easy Switching: By Bluetooth and 2.4G USB, the Nulea bluetooth keyboard can establish connections with up to three devices simultaneously and switch between them by pressing a button. This function allows you to utilize the keyboard to begin writing an email on your computer, switch to your smartphone to send a brief text message, switch to your laptop to change the background music, and then switch back to your PC to finish that email with one-tap. Adjustable 7 Color Backlight Lighting: The wireless bluetooth keyboard has a colorful backlit design. You can choose your own brightness and lighting kind with its 3 brightness