The clothes have a USB interface, please bring your own power bank. Our package does not include a power bank.SIZE CHART:M: length 63cm, chest 104cm, hem 98cm, shoulder 41cm, suitable for weight 50-55kg, for height 155-165cm;L: length 65cm, chest 108cm, hem 102cm, shoulder 42.5cm, suitable for weight 55-65kg, for height 160-170cm;XL: length 67cm, chest 112cm, hem 106cm, shoulder 44cm, suitable for weight 65-75kg, for height 165-175cm;2XL: length 69cm, chest 116cm, hem 110cm, shoulder 45.5cm, suitable for weight 75-85kg, for height 170-175cm;3XL: length 71cm, chest 120cm, hem 114cm, shoulder 47cm, suitable for weight 85-92kg, for height 170-185cm;4XL: length 73cm, chest 124cm, hem 118cm, shoulder 48.5cm, suitable for weight 92-95kg, for height 170-185cm;5XL: length 75cm, chest 128cm, hem 122cm, shoulder 50cm, suitable for weight 95-100kg, for height 175-190cm;6XL: length 77cm, chest 132cm, hem 126cm, shoulder 51.5cm, suitable for weight 100-105kg, for height 175-190cm;11 Heating AreaRechargeable heated vest has a heating system that consists of 11 carbon (graphite) fiber heating pads. It produces sustained heat for your 4 core body areas, including neck, back, abdomen and waist, and helping to maintain body warmth.3 Heating LevelThis heated vest coat has three heating levels temperature. Three temperatures can be adjusted only by pressing a button on the heated jacket. High temperature: red color, 45; Medium temperature: white color, 35; Low temperature: blue color, 25.