The Lenovo Essential Wireless Keyboard and Mouse Combo a sleek and stylish keyboard and mouse! The slim 2.5 zone wireless keyboard has a responsive key feeling and premium typing experience. The standard size wireless mouse compliments the keyboard in design and functionality.- Advanced 2.4ghz wireless connection ensures consistent reliable connectivity- Plug-and-play micro wireless receiver easily connects both keyboard and mouse- LED indicators show battery life status- Keyboard has low-profile island-style keys adjustable tilt legs and is spill-resistant 1 year battery life- Mouse has optical sensor for precision tracking ambidextrous three-button design 1 year battery life