Far infrared heated USB shoes warm boots for men winter Low Voltage Electric Heating Shoes for MenAdvantages&Performance: Battery3.7V4WRechargeableDescriptionFar-infrared heating hand protection padAdvantageSafe and reliable
Low voltage
Keep warmAdjustableTwo adjustable temperature levels
2-level controlled
High red led 42~46ºC, 6H
Med. green led 38~42ºC, 8H
Far-infrared Health Care Principle:
Modern medicine shows that far infrared ray is easily absorbed by the body, and produce resonance effect in the human body. When the heat is generated from inside to out, It makes capillaries expansion, promotes blood circulation and enhances metabolism, reduces muscle fatigue, and thus play a role in health care.