1. Rated voltage: 3.7V
2. Comes with two 3.7V 1900mAh li-polymer battery and one AC charger.
3. Temp.-Controller: 3 heat settings: High-Med-Low, pushed button.
1. Foot is the second heart of a human body. One body can be kept warm by keeping heating his feet. Heating shoes prevents frostbite of the feet, activates blood flow, eliminates tiredness, etc.
2. Use high technological bio-thermal fiber as a heat source.
3. Possess far infrared physical therapy (radiating 5-12um light wave on conducting electricity)
4. Heating part has even temperature with surface temperature between 35℃ and 45℃.