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.