Misc. Health & Beauty Products
Red Light & Infrared Therapy Pad - 660nm/850nm Deep Tissue Pain Relief for Muscle & Joint, Portable Light Therapy Belt for Back, Knees, Hands - Home Use Heating Wrap for Women & Men
Visible Red Light (660nm): Penetrates blood vessels and subcutaneous muscle tissue, producing a comfortable temperature of up to 40°C (104°F) to release lactic acid, increase blood flow, and relax muscles Invisible Infrared Light (880nm):...
https://www.bizrate.co.uk/mischealth_beautyproducts/red-light-infrared-therapy-pad-oid38690275861.html