Logitech K780 Multi-device Bluetooth + Unifying Dual Mode Wireless Keyboard with Stand (Black) Feature: 1. The input can be switched between 3 different devices. 2. Dual connection technology and long battery life. 3. Full-size keyboard, low profile buttons, button layouts to familiarize you. 4. From smartphones to iPad Pro, a wide range of devices can be securely attached to the ideal angle for easy reading and input. 5. Suitable for a variety of operating systems. Specification: 1. Size: 158x380x8mm. 2. Weight: 875g. 3. Supports most smartphones and tablets up to 11.3mm thick, either in portrait or landscape mode. Only for landscape mode iPad Pro (12.9 inches). 4. Wireless range: 10 meters. 5. Battery: 2 x AAA. (not included). 6. Battery life (non-rechargeable): 24 months. 7. USB connection: An available USB port is required. 8. Bluetooth connection: Bluetooth Smart Ready device (HID profile) that requires keyboard support. 9. Logitech Technology: 2.4GHz. 10. System Requirements: Computers, phones and tablets that support external keyboards. Windows 7, Windows 8, Windows 10 or higher. Chrome OS. Mac OS X 10.10 or higher. Android 5.0 or higher. iOS 5 or higher. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store