1.Description: Lenovo MK618 Wired Keyboard and Mouse Combo Ergonomic Desktop Full Size USB Wire Corded Mouse Keyboard Set with Number Pad/1000DPI Optical Mouse for Computer/Laptop/PC/Desktop/Notebook 2.Features: Plug and play - No software needed. Both USB keyboard and mouse work right away when you plug in the USB cord to your computer. Comfortable to use - Ergonomic design ensures the best using experience after long time use. Wired keyboard and mouse combo - Wired connection for maximum stability. 1000DPI precision mouse control - High-definition optical mouse for smooth, accurate cursor control. Strong durability - Easy-to-read keys, with bold and bright white characters, passed 10 million typing test. 3.Specifications: Brand: Lenovo Product size: 44015025mm(Keyboard)/108.8561.2539.55mm(Mouse) Material: ABS Working voltage: DC 5V Color: Black Connection Type: Wired via USB Backlight: No 4.Note: There is a little of difference according to manual measurement. The actual use may