●App remote control and Kemimoto customer service: with app remote control, you can adjust the temperature of the heating socks, which makes it easier to choose a suitable temperature. You can download the "WARM UP" from the App Store. Please read the instructions carefully before use. If you have any questions, please feel free to contact us. Our excellent, professional customer service team will help you solve problems. Thank you for your trust and support for KEMIMOTO. ●360° heating and quick heating: Kemimoto heated socks are a pair of improved socks that are 360° heating in the forefoot and instep. Thanks to the built-in, high-quality heating wire and 7.4 V USB cable, our heating socks can be quickly heated within 3-5 minutes, which keeps the feet warm in case of insufficient blood supply. ●🔥🔥【4 levels adjustable temperatures】- The 2022 heating socks have 4 intelligent heating mode settings. You can choose according to the actual weather temperature and your own needs, so that your feet always keep the most comfortable warm state. Low 38-40°C (8-10 hours). Medium: 40-45℃ (6-7hours), High: 50-55℃ (5-6 hours). Higher: 60-65°C (3-4 hours) ●High-quality material and machine washable: the heating wire of these electric socks is made of high-quality composite metal material, the fabric is made of cotton and elastane, which provides good elasticity, breathability and warmth. A laundry bag is included in the pack to protect the heated socks and extend their life. ●Practical design: the latest version of the heating socks has a battery pocket with button to prevent the battery from falling out when walking or running. In addition, the warm socks are equipped with L/R markings for left and right, which makes it easier to put on and prevents them from being worn incorrectly.