The wm126 wireless optical mouse from dell offers you everyday wireless performance with excellent battery life. It is designed to create a clutter-free workspace with a reliable, plug-and-play rf wireless connection. This wireless mouse provides reliable performance and a stable wireless connection through the usb anchored rf wireless dongle. Its plug and play feature allows for easy installation so users can get started using their mouse within minutes, with no confusing software or setup requirements. The small size and wireless performance help to make wm126 wireless optical mouse a great option for on-the-go users. There is dell wm126 wireless optical mouse, 1aa battery and usb receiver.