The Volas Vitality™ MagicPro 2.0 image shows three circular buttons on one arm of the frame. The written listing does not name them.
Seat the device first, then use those buttons. Do not invent mode, timer or charging labels that are not on the page. If a booklet in the box names the buttons, follow that booklet.
Open the Volas Vitality MagicPro 2.0 listing for the product photos.