1.  Silent button, creating a quiet and comfortable environment.

2. 2.4G wireless transmission, thetransmission distance up to 8-10meters. 

3. Red light optical technology, accurate positioning.

4. Ergonomic shape design, rightand left. 

5. Third gear DPl adjustable, 800.1200-1600.

6.  Built-in NANO receiver, easy to carry.

7. Automatic sleep technology, up to 6 months of battery life.