"● Silent button, creating a quiet and comfortable environment.
● 2.4g wireless transmission distance up to 8-10 meters.
● Red light optical technology,accurate positioning.
● Ergonomic shape design, right and left.
● Third gear DPI adjustable, 800/1200/1600.
● Built-in NANO receiver,easy to carry.
● Automatic sleep technology,up to 6 months of battery life."