Logitech MK295 Quiet Wireless Keyboard & Mouse Sets Quiet office with 90% less clicking and tapping noise. (1) Model Mouse: M220 Keyboard: MK295 (2)Keyboard Specifications Mouse L*W*H=99*60*39 mm Keyboard L*W*H=441*149*18 mm Battery capacity 999mAh Keyboard character laser engraving process Key cover material ABS Power Supply Dry Battery Keyboard structure Other (4)Shaft type: No shaft Type: Keyboard and Mouse Kit Number of keys: >100 keys Connection type: Non-hot-swappable Compatible System: Windows Backlight effect: No light Connection method: Wireless Simultaneously connected devices: 1 Color: Black (5) System Requirements Windows 10 or later, Windows 8, Windows 7 Chrome OSTM Requires a USB port to connect to the Internet to download additional software