The Volas Vitality™ MagicPro 2.0 listing frames the device as everyday home comfort and mentions resting. Sit still enough to keep the U-shaped frame in place.
The page does not say to use it while driving or as a substitute for medical care. No minute count is listed. Follow any booklet in the box rather than an invented timer.
Read the Volas Vitality MagicPro 2.0 page for the wearable shape.