Infrared Heating Knee Support Brace Electric Massager Wrap. Features: 1.It's Specially Designed for Knee, but Can Be Used on Calf, Thigh, Arm As Well if Need Be. Adjustable Hook and Loop Straps Closure, 2.it Can Fit a Knee Circumference Not over 21 Inch. 3.We Have More Temperature Settings for Choice, Can Meet People's Various Need of Heat Therapy. Great for Use when You're Watching TV or Reading Book on Sofa at Home, when You're Working in Front of Computer, or Even During Your Travel.  USB Output Voltage:5V/DC The First Gear ( Red Light), The Temperature is About 44 The Second Gear ( White Light), The Temperature is About 41 The Third Gear ( Blue Light), The Temperature is About 38 Adapter Output Voltage:7.9V/DC The First Gear ( Red Light), The Temperature is 56-65 The Second Gear ( White Light), The Temperature is About 46-55 The Third Gear ( Blue Light), The Temperature is About 40-45 Note: There Will Be 2-4 of Error with Different Measuring Instruments and Measuring Position   Functions: *Relieve Knee Pains Associated with Arthritis, Bursitis, Strains, Sprains, ACL PCL MCL Meniscus Tear *Aid in Knee Injury or Surgery Recovery *Leg or Arm Muscle Fatigue Soreness, Cramps Relief *Knee Warm Keeping; Other Situations That Need Hot Compress *The Heating Pad Has a Built-in Mesh Bag (13.5*18cm), if Need Be, Put a Ice Bag In, It Can Be Used for Cold Compress. Washing Method: Wash It Gently by Hand in Water, Don't Wash It by Machine. (Washable but Not Waterproof) Package Includes:(According to Your Order) 1 X Knee Heating Pad 1 X USB Cable (2M)  1 X US Plug/EU Plug (Optional ) . We are an international seller, your order will be shipped from abroad so please allow the necessary time of minimum 14 working days for delivery right now depending on where you ship to, due to ongoing delays in postal deliveries globally.