Features: 1. Multifunctional hand warmer: warm hands + warm shoulders + warm waist + warm abdomen + warm uterus + warm legs, suitable for multiple parts of the body, giving you warm care anytime, anywhere. 2. This hand warmer bag uses high-tech new material graphene as the heating body and high-quality polyester fabric, which is soft and skin-friendly, light and warm, stable in performance and long in service life. 3. Rapid heating, large area heating on both sides, long-lasting lock in temperature, help you dissipate the cold, and bring you the most comfortable warmth. 4. Built-in intelligent temperature control chip, three-speed intelligent temperature adjustment, to meet the actual needs of different groups of people, you can choose the most suitable temperature for you. *Washing method: washable, lay flat to dry; dry clean, wipe with a rag; do not bleach, do not iron. * USB interface settings: power bank, computer, power socket can supply power. Specifications: Product fabric: 100% polyester Filling material (inner core): Graphene heating sheet Temperature control method: three-speed temperature control Power input: 5V-2A Power connection: power bank/computer/power socket Product size: about 420*270mm Timing time: 2 hours Rated power: 10W Packing size: 28.5*21*6.5cm Packing List: 1* Hand Warmer 1* User Manual 1* certificate