Logitech MK270 Wireless Keyboard and Mouse Combo for Windows, 2.4 GHz Wireless, Compact Mouse, 8 Multimedia and Shortcut Keys, 2-Year Battery Life, for PC, Laptop - USB Wireless RF 2.40 GHz Keyboard - English - Black - USB Wireless RF Mouse - Optical - 3 Button - Scroll Wheel - Black - Multimedia, Internet Key, Email, Play/Pause, Volume Control, On/Off Switch Hot Key(s) - AA, AAA for PC - Retail - 1 Pack Logitech® Wireless Combo MK270. The reliable wireless combo with a tiny Logitech plug-and-forget receiver. Logitech Advanced 2.4 GHz wireless delivers the reliability of a cord plus wireless convenience for up to 10 meters, with virtually no delays or dropouts-even in the busiest wireless environments. The Logitech® receiver is so tiny, you can plug it in once and forget about it. Plus, the mouse features a built-in storage compartment, so you can take your mouse wherever you use your computer. A 36-month keyboard and 12-month mouse battery life-with auto-sleep and on/off switch-lets you go years without the hassle of changing batteries. And the simple software-free setup will have you on QQ, Taobao, and Baidu in no time.