Note: ①Battery not included,Please use your own power bank ②Please choose suitable power bank model.If you feel the vest does not heat better,pls check whether your power bank model is right. Power bank Requirements: for 11/19 zones heated jacket,you can use 9V/2.2A,12V/1.67A,4.5V/5A,4.5V/5A,7.4V/3A power bank. (20 W,22.5W power bank is suitable for 11/19 zones heated jacket) for 2/4/9 zones heated jacket,you can use 5V/2A,5V/3A,12V/1.5A,9V/2A, 9V/2.2A,12V/1.67A,4.5V/5A,4.5V/5A,7.4V/3A power bank.(10W,15W,18W,20W,22.5W power bank is suitable for 2/4/9 zones heated jacket) please use power bank with high USB Power Delivery(unit:W), The higher the USB Power Delivery, the higher the heating temperature. (output Power (W)=Voltage (V) × Current (A).for example :output power 10W=5V*2A / output power 22.5W=5V*4.5A) If you do not have the above required power bank, you must first prepare a qualified power bank before purchasing! If you don't know what kind of power supply to buy, you can leave us a message and we will recommend it to you! How to Use: 1. Take out the USB cable from the inner pocket and plug in the power bank. 2. Press and hold the button for 3 seconds,start preheating. If you need to adjust the temperature, you can short press to select the heating level. 3.You can trun switch to red state and keep for 5 mintues,it will heat up fast. 4.When you use it,you need to contact the power bank all the time. How to select 19 Areas Heated Jacket has Four Switches 11 Areas Heated Jacket has Two Switches 2/4/9 Areas Heated Jacket has One Switch About Jacket please order with confidence,The quality of our products is very good. Please rest assured,before delivery, we will carefully check each package to ensure that the jackets sent out can work normally. Buyer's true evaluation very good quality、Super warm jacket、heats really very well、heats really very well、Nice and warm It is Asian Size,It is2-3 Size Smaller than Europen Size,Please Choose 2-3 Size Bigger than Your Normal Size. It‘s Asian Size,It is 2-3 Size Smaller than Europen Size,Please Choose 2-3 Size Bigger. Size Bust Shoulder Sleeve Length Length CM Inch CM Inch CM Inch CM Inch S 98 38.6 40 15.7 60 23.6 62 24.4 M 108 42.5 42 16.5 62 24.4 64 25.2 L 110 43.3 43 16.9 63 24.8 65 25.6 XL 112 44.1 44 17.3 64 25.2 67 26.4 XXL 116 45.7 45 17.7 65 25.6 69 27.2 3XL 120 47.2 46 18.1 66 26.0 72 28.3 4XL 124 48.8 47 18.5 69 27.2 73 28.7 5XL 128 50.4 49 19.3 70 27.6 74 29.1 6XL 134 52.8 51 20.1 71 28.0 77 30.3 Attention:①Please Refer to Suitable Height and Bodyweight .②Pls allow 1-3 CM error. ①We are Asian size, it is 2-3 sizes smaller than European size. ②For Men,We Suggest to choose 2-3 Size bigger than your normal size.For Example:Men model : 180CM, 85KG: size :4XL; Men model: 175CM, 75KG :Size 2XL ③For Women,We suggest you choose 1-2 Size Bigger than your Normal Size.For Example:Women model: 160CM, 55KG :Size M ④ Please choose the correct size according to our size chart and height and weight recommendations. Height/Weight 155-160 CM 161-165 CM 166-170 CM 171-175 CM 176-180 CM 181-185 CM 186-190 CM 191-200 CM 35-45KG S S S M M 46-50 KG M M M M L XL 2XL 2XL 51-55 KG M M M L XL XL 2XL 2XL 56-60 KG L L L L XL 2XL 2XL 3XL 61-65 KG XL XL XL XL XL 2XL 3XL 4XL 65-70 KG XL XL XL XL XL 2XL 3XL 4XL 71-75 KG 2XL 2XL 2XL 2XL 2XL 3XL 4XL 5XL 76-80 KG 3XL 3XL 3XL 2XL 3XL 3XL 4XL 5XL 81-85 KG 4XL 4XL 4XL 3XL 4XL 4XL 4XL 5XL 85-90KG 5XL 5XL 4XL 5XL 5XL 5XL 6XL 91-100KG 5XL 5XL 5XL 6XL 6XL 6XL Our jactect are thicker and keep warm better.