La description

1.Description: heating foot insoles 2.Power :“AA” battery 4.5V 3. Material: Carbon fiber 4. Power Rating:2W , can continue to use for 4 hours 5. Temperature variation range: *6℃�*2℃ 6. Product size: **0MM***0MM bettery box with her, very convenient .when bettery use up, you can change to use another ones to continue heating power. far infrared-rays 5 um to *0 um she produces is healthful to us, no harm only health. in winter along, giving you warm from feet to your heart!