*Electric Heating Insole Lithium Battery Rechargeable Remote Control Thermostat Heating Three-speed Temperature Adjustment for Cold Protection Keep Warm *Specifications *Material: Plastic plus carbon fiber; Color: red and black; Size : 26*9*5cm; M Size: suitable for 35-39 shoes; L Size: suitable for 40-46 shoes; Weight: 297g; Packing size: 5*11*32cm ; Voltage: 3.0V-4.2V; Battery capacity: 2100mAh; Input: AC/100-240V40-60Hz; Output: DC/4.2V-5V 500*2; Charging time: 4 hours; Using time: 10 hours; *Packing List 1* pair of electric heating insoles (with built-in battery) 1* Remote control 1* Dual-head USB Charging Cable *Features *1.This heating insole is designed with a mesh surface, breathable and sweat-absorbent, fits the foot, and is easy to use without leggings. *2.Built-in lithium battery, carbon fiber material heats up, it can be heated continuously for 4-8 hours, the warmth is very good, even if it is minus ten degrees, it will not feel cold. *3.Three levels of adjustable temperature: low-grade 40, medium-grade 50, high-grade 55, to meet the needs of different groups of people. *4.It can improve the coldness of the feet, effectively stimulate the blood circulation of the feet, and help you resist the cold weather. *5.It is suitable for outdoor working people, elderly people, people who are cold and afraid of cold, and people who like to do outdoor sports or travel in winter. *Due to different measurement methods, please allow a measurement error of 2-3cm. *Due to the problem of shooting tools and light, please allow the color difference between the picture and the product.