Product Name: Knee Heating Pad Wrap Heated Knee Brace, Heat Therapy Hot Compress to Warm Joint Relief Pain of Knee Stiff, Arthritis, Strains Model NO.: HKN-021 Gender: Unisex Trademark: warmfeel Transport Package: Color Box Specification: 32x20x4cm Origin: China HS Code: 6217109000 Product Description 1)Built-in carbon fiber heat system2) Keeps warmly and cures ache3) Power supply: 5V,2A USB power bank or adapter4>max temperature:55ºC (131°F)5)Outer material: 100% polyester ,neoprene6) Size: 20x110cm7)three stage heating level controller