1、Black Technology Warmth: Using advanced heating technology, 22 areas of the body are heated, fully upgraded, allowing you to feel warm in the cold winter. 2、Intelligent Temperature Control System: 25~55°C adjustable temperature, 3 levels of temperature control, one-button temperature control, allowing you to adjust the temperature according to your needs. 3、10 Seconds Rapid Heating: Using efficient heating materials, it can be heated in 10 seconds, allowing you to quickly feel warm in the cold winter. Men's heated underwear set, 22 heating zones, intelligent temperature control, 10 seconds rapid heating, 5V safe voltage, 8+ hours of battery life, water-resistant. Features: Black Technology Warmth: Using advanced heating technology, 22 areas of the body are heated, fully upgraded, allowing you to feel warm in the cold winter. Intelligent Temperature Control System: 25~55°C adjustable temperature, 3 levels of temperature control, one-button temperature control, allowing you to adjust the temperature according to your needs. 10 Seconds Rapid Heating: Using efficient heating materials, it can be heated in 10 seconds, allowing you to quickly feel warm in the cold winter. 5V Safe Voltage: Only heat conduction, no electricity conduction, safer to use. 8+ Hours of Long-lasting Battery Life: Built-in large-capacity battery, a single charge can be used for more than 8 hours, allowing you to keep warm for a long time when you are out. Specifications: Material: Knit surface: 95% cotton, 5% spandex,  Lining: 95% polyester, 5% spandex Color: Black Input voltage: 5V Power: 7.5W Size: L-4XL （Optional） Weight: 1028g/36.26oz - 1182g/41.69oz Package list: 1*Heated underwear top 1*Heated underwear pants 1*Heated underwear top 1*Heated underwear pants