Safe & ComfortableUpgraded designed heating system ensures you enjoy comfortable warmth.graphene carbon fiber wire heater no harmful radiationStable performance. safe and reliable.jacket soft & comfortable .It can help you easily live through a whole winter Heat QuicklyAfter connecting any 5V/2A power bank. just a simple press of the button can heat quickly in seconds.intelligent three-speed adjustable (High. medium. low) . carbon fiber fiber heating elements generate heat across core body areas (Mid-Back. Neck).which can resist perfectly against cold in winter and wind in spring USB RechargeableBuilt-in heating module. intelligent heating.You can use your own power bank to charge the heat up jacket. Up to 8-10 working hours NOTE: No battery included Heated Jackets For Men & WomenHeated Jackets lightweight insulation. waterproof and windproof. Support Hand/ Machine/ Dry wash.suitable for men. women. boys and girls. Perfect as birthday gift. thanksgiving gift and christmas gift. NotePlease take out the power bank and put the usb plug in the pocket before washing Suitable For All Kinds Of ScenesHeated jacket to keep you warm anywhere. Perfect for outdoor enthusiasts snowmobiling. motorcycling. camping. Hiking. Skiing. Skating or just plain walking around in cold seasons.Note: Our size is Asian size. some customers have feedback that the size is relatively small. please read the 7th picture carefully before buying. and buy according to your actual situation. thank you for your understanding