Enjoy the freedom and convenience of wireless technology. You can roam up to 15 feet away with a strong signal. Or, you can take the mouse separately to use with a laptop while traveling-the tiny transceiver conveniently snaps into the bottom of the mouse when it's time to pack up and go. This keyboard also has Advanced Encryption Standard (AES), which protects your personal and business information by encoding your keystrokes. Runs off of 4 AAA batteries (included)