Performance. Laser performance: On your desk, enjoy laser-precise tracking and instant response. Freespace motion sensing: In the air, use MX Air to browse and play your favorite media. The sensor transforms hand motions into natural, responsive cursor controls. Adjust volume by waving to the right or left; skip tracks with a flip of the wrist. Scroll panel: Experience hyper-fast scrolling at the touch of a fingeron your desk or in the air. Control. Easy control of PC-based entertainment: Take command of your PC-based media with intuitive wave-and-click controlan easier and more natural way to enjoy your favorite media. Gesture controls: Control playback and volume with hand motions. Adjust volume by waving to the right or left; skip tracks with a flip of the wrist. Convenience. Li-ion battery: Recharges faster, lasts longer. 2.4 GHz wireless: An operating range of 30 feet lets you navigate media from anywhere in the room.