describe:1. Scope of application: It has a wide range of applications and can be used to relieve stiff shoulders, scapula sprains, tendonitis, paralysis, stiffness, and pain.2. Function: Shoulder heating pad can relieve pain, relax muscles, reduce stress, and help speed up recovery after injury.3. Features: The heating pad has built-in infrared carbon fiber wire, which can warm the shoulders and promote blood circulation.4. Adjustable design: The shoulder straps are soft and adjustable, comfortable to wear, and can minimize the burden on your shoulders.5. Easy to use: It heats quickly, has 3 temperature modes, and is simple to operate. Press and hold the button for 3 seconds to turn it on or off.Specification:Item Type: Heating PadMaterial: carbon fibertemperature:Green light: lowest temperature, temperature range is 45 to 50Blue light: medium temperature, temperature range is 50 to 55Red light: maximum temperature, temperature range is 55 to 60size:Size Men (weight) kg Women (weight) kg Shoulder width (cm)S45-60 45-65 36-40L60-80 65-85 44-502XL: 80-100 85-105 54-60packing list:1 heating pad