Description: 【Premium Material】: Made from soft, breathable, elastic, and quick drying material in black color that heats up the entire sole of your foot. The elastic thickened design ensures a comfortable fit 【Feature】: Our rechargeable heated socks come with 2 x 6000mAh batteries, providing long time life and temperature control - highest level (70°C, 3.8 hours), high setting (60°C, 5 hours), medium (50°C, 8 hours) and low setting (40°C, 12 hours) 【APP Control】: You can easily control the warming socks through the app to conveniently know temperature and adjust settings anytime 【Thermal Socks】These electric heated socks heat up quickly and provide even warmth, making them suitable for those who constantly have cold feet or work in damp, windy, wet, and cold environments 【Widely Used】The electric socks foot warmers are suitable for outdoor sports or work in winter: hunting, hiking, camping, skiing, motorcycling, cycling, skateboarding, and fishing Specification: Material: Fiber Size Chart: 37cmx25cmx11cm/14.57inchx9.84inchx4.33inch Package Includes: 1 Pair of Socks, 2 Batteries, 2 Data Cables, 1 Instruction Manual Note: Please allow slightly errors due to manual measurement and different monitors.