Functions: Full blade heating, low-frequency pulse microcurrent, 650nm wavelength red light Full blade heating: Three-level temperature adjustment, 3-second heating, 42°C-45°C-48°C Low-frequency pulse microcurrent: 9-level adjustment Hot compress + scraping + microcurrent + red light Material: Metal + plastic One Knife for 5 Purposes: the elctric fascia knife body design is diversified to meet the diverse massage needs. Relief for Muscle Tension and Fatigue: Target the tightness, stiffness, and fatigue in your shoulder and neck muscles caused by prolonged sitting (e.g., office work, driving) and address muscle soreness and pain from limited movement or control during sports, including tennis elbow, golfer's elbow, neck discomfort, and foot issues. Educational Tool for Health Professionals: Ideal for learning and utilization by physical therapists, sports rehabilitation specialists, athletic trainers, yoga instructors, fitness coaches, masseurs, acupuncturists, and other related practitioners. Versatile Massager: Enjoy the convenience of a multi-purpose tool designed for a variety of applications, making it a versatile addition to your routine. Color: Black Specification: Package Contents: 1 x host 1 x charging cable 1 x instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.