Smart Electric Set: Smart temperature control, 8 carbon fiber heating elements heat up the core parts of the body and heat the shoulders, chest, abdomen, waist, buttocks, elbows, thighs and calves. USB CHARGING: The electric underwear uses a USB interface and is powered by any portable 5V\/2A USB charger. The USB connector is compatible with most portable chargers on the market. The heating can be started in 30 seconds, with long duration and long heating time. Note: There is no power Temperature control: Thermal and the thermal underwear can be charged, the temperature can be adjusted in 3 levels, and the indicator light is used to adjust the desired temperature. Washing instructions: machine washable\/hand washable. If the electric ski underwear suit is machine washed in the winter, put the men's sports shirt in a laundry bag for washing. To ensure the longevity of the clothes, try to avoid heavy washing and dry them normally. Rinse with clean water after washing, do not wring dry. Allow to dry naturally. MULTIFUNCTIONAL warming underwear helps improve blood circulation and improve metabolism. It is very suitable for people who are afraid of colds, Raynaud's disease, arthritis, poor blood circulation and stiff joints. Our USB heated thermal for set is the perfect gift for the elderly, lovers or friends. The Best Thanksgiving and Christmas Gifts.