The Logitech Wireless Keyboard K270 has everything you need, right at your fingertips. Its tiny Logitech Unifying receiver is small enough to stay in your laptop and connect whenever you need it. It also allows you to easily add another compatible mouse, keyboard or number pad without the hassle of multiple USB receivers. This leaves your other USB ports free for all of your other devices and needs. Advanced 2.4GHz wireless connectivity gives you the reliability of a cord from up to 10m away, while auto-frequency switching ensures virtually no signal loss, even in the busiest wireless environments. This Logitech wireless computer keyboard helps keep your information secure with 128-bit AES keyboard encryption, one of the highest levels of security available.