This sleek desktop is contemporary and minimalistic. It has quiet-touch keys for a serene typing experience and a full-size mouse that provides comfortable, precise navigation. The Wireless Desktop 900 also includes Advanced Encryption Standard (AES),which is designed to help protect your information by encrypting your keystrokes. Features: Advanced Encryption Standard (AES) 128-bit encryption Quiet-touch keys Easy, reliable plug-and-play transceiver Easy-access hot keys Keyboard: Black. Plug and play. Cordless. USB connectivity. Programmable hot keys. Mouse: Optical sensor. Nano receiver. Scroll wheel. Battery indicator light. Approximately 24 months battery life. General information: Batteries required 2 x AA (included) .