Logitech, Inc. : Ergonomic, split-key design and sculpted mouse follows the natural shape of your hand for superior comfort and precision. 3-way adjustable tilt legs enable a truly personalized experience by letting you choose the keyboard angle that matches your personal typing style. Convenient hot keys allow effortless control of music or video playback, adjusting volume, and opening applications, games, folders or web pages with one-touch efficiency. Innovative mouse features a tilt wheel that lets you scroll pages top-to-bottom or side-to-side and five re-programmable buttons to control volume and web browser without lifting your hand. Instant, hassle-free setup provides easy connectivity through either 1 USB or 2 PS/2 ports. Battery status indicator lets you know when batteries are running low. For Device Type: Computer; Wired/Wireless: Wireless; Maximum Wireless Range: N\A; Connector/Port: PS/2; USB. : Includes SecureConnect USB-PS/2 receiver, USB to PS/2 adapter, 4 AA alkaline batteries, CD with software.