Logitech MK275 Wireless Keyboard & Mouse Sets (1)Specifications and Details Mouse L*W*H=100*58*34 mm Keyboard L*W*H=440*140*30 mm Keycap characters laser engraving process Keyboard Structure Other Keyboard cover material ABS Battery Capacity 999mAh Dry battery power supply (2) Shaft type: bodiless shaft Type: Keyboard and Mouse Set Number of keys: >100 keys Connection Type: Hot Swap not supported Compatible System: Windows Backlight effect: No backlight Simultaneously connected devices: 1 Connection method: Wireless Color: Black (3)System Requirements Windows XP, Windows Vista, Windows RT, Windows 7, Windows 8, Windows 10 Chrome OS USB port