LONG-LASTING BATTERY The heated socks come with two 5000 mAh battery. Which is thick and quality, and can reach up to 12 hours in low temperature. Delivering continuous warmth and comfort to your feet INTELLIGENT TEMPERATURE CONTROL The sock can slide to adjust the temperature 86℉-158℉, and also be adjusted according to the gear, there are four gears that can be selected to meet different needs. 2 CONTROL METHODS APP CONTROL Steps: 1. Install the APP called "warmworld"; 2. Turn on Bluetooth to Connect the Socks 3. Turn On the Power Timer: You can schedule automatic shutdown with 6 time intervals (30, 45, 60, 90, 120 minutes) for the heated socks. Quick Heater: The App enables the heating socks to warm your feet within 15 seconds after you turn on the quick heater switch. BATTERY CONTROL 一一 When The Phone Is Not With You Steps: 1. Press the battery button to turn on; 2. Press to switch the heating level. MACHINE WASHABLE The heated socks can be washed by hand and machine. (Laundry bag included). Tips: Remove the battery before washing. THICKEN AND SOFTED The socks soft and breathable, Heating cord perfectly hidden in the sock for warmth and comfort. HIGH ELASTIC Highly elastic fabric, suitable for a wide range of people.