With this device, you can also make your therapeutic massage as smooth or as firm as you would like, making use of dual pivoting heads and four velocity options. You’ll also receive two sets of interchangeable attachments. In screening this neck and back massager, we found the many velocity options https://allhealthmarket.com/product/health-and-beauty-2/skin-care-health-and-beauty-2/anti-aging-products/facial-body-muscle-stimulator-electrode-face-cheek-slimming-massage-double-chin-remover-electric-face-lifting/