USB POST TO CONNECT POWER BANK(power bank is not included): USB heated vest built-in USB port to connect the power bank.Arbitrarily adjust, put the charging treasure into the vest pocket, carry it with you, continue to heat anytime and anywhere. 4 HEATOMG ELEMENTS: Rechargeable heated vest desiged with 4 carbon fiber heating elements generate and trap heat across core body areas,which can effectively warm body and dredge the meridians. 3 HEAT SETTINGS ADJUSTABLE HEATING: 3 Heated levels from 35 to 55 with smart heating systerm. COMFORT & SAFETY: Heated vest made of 100% polyester fiber, adopts the Infrared heating technology combined with ergonomic clothing design. MULTIFUNCTION AND OCCASIONS: Electric heated vest is good for pain relief, perfect for outdoor activities.such as snowmobile, motorcycle, mountain, camping, hiking, skiing and so on. GREAT GIFT: Far infrared heating materials promote blood microcirculation, Good for relief pain of muscles. Best gift for parents and grand old man.