Product Description: ・"Heated Socks, No More Cold Feet in Winter": These heated socks use energy-saving carbon fiber heating elements. When connected to the battery, the heating surface of the heated socks quickly heats up, warming up the area around the heater in just 3 seconds. ・"3-Level Temperature Adjustment": Temperature can be adjusted in 3 levels. * "Low Mode -- / Medium Mode -- / High Mode --" The mode can be directly adjusted with the switch on the battery. ・Color: Black ・Set Contents: ① Rechargeable Lithium-ion Batteries X 2 * 2000MA Lithium-ion Battery ・Heating time is approximately 4 to 8 hours depending on the heating mode. ② Socks Body Size: 23-28cm Approximately 25cm from heel to top ③ USB Charging Cable ・The battery is USB rechargeable and can be charged safely and easily from a laptop, mobile battery, smartphone charger, car power supply, etc.! ・How to Use: Press and hold for 2 seconds, and the three LEDs will light up. After that, press lightly once to decrease the number of lights one by one! Press and hold to turn off the power! ・Notes: ① "Please note! For safety, the temperature of the socks is kept within a certain range. Usually, you can reach the ideal temperature after wearing them for 15 minutes. ② This product can be washed directly in the washing machine. Hand washing is also recommended. (Be sure to remove the battery before washing and let it dry naturally before use). ③ We will check the battery operation before shipping! ・Used 3 times and then not used again. ・The socks will be washed and then packed for shipping. ・We are open to price negotiations, so please feel free to ask any questions in the comments.