Women Heated Jacket Smarkey push the limits of science and product design. We believe no one should have to suffer from the bitter cold, whether it’s your grandma who can’t seem to stay warm, or the airline worker on the tarmac in the heart of winter. No matter the person, everyone deserves the opportunity to be comfortable and warm. Smarkey Heated Jacket means having control over your core body temperature. We don’t like heating sensations, we like real change you can feel and see with a thermometer— that’s our difference. We don’t want our customers to feel warm, we want them to be warm. Read more 1. What is the best way to clean heated jacket? Remove heated jacket battery, hand wash or machine wash ( in laundry bag). Don’t twist or wring. Hang dry. Do not machine dry. Do not iron. 2. How long time will heated jacket battery last while working? At ambient temperature of 25℃/77℉ testing, heated jacket battery will last approximately 8-9 hours on low, 6-7 hours on medium, or 3-4 hours on high. 3.What's the temperature when heated jacket in use? At ambient temperature of 25℃/77℉ testing, the heating area will up to 45℃/131℉ on high setting, 42℃/113℉ on medium setting and 38℃/100℉ on low setting. Heated Jacket heating system Smarkey heating element uses 8.4V power, all internal voltage does not exceed 8.4V, safe voltage for human is within 36V. All current carrying components are insulated, no current will pass human body. Smarkey Women Heated Jacket Slim Fit Design To turn on, press and hold the heated jacket power switch for about 3 seconds. The Cordless Heated Jacket will begin to preheat (5 minutes) and then adjust to the medium setting.Temperature setting can be adjusted at any time by pressing the Cordless Heated Jacket power button.Each press will cycle through the heated jacket’s temperature settings. Pre-Heat - Red LED fades on and off High - Red LED continuous Medium - White LED continuous Low - Blue LED continuous Read more 3 heating zones across the left & right chest, mid-back Women's heated jacket designed with the ultra-thin and flexible heating elements generate 3 heating zones across the left & right chest, mid-back. 5000mAh battery can support up to 10 hours heating. Keep Warmer for neck and wrists Stand-up collar design for neck much more warmer. Machine Cold Wash Machine Cold Wash and dryer safe. Heated Jacket with Battery Pack 7.4V Women's Heated Jacket with Battery Pack 7.4V, Lightweight& Slim Fit insulated Electric Vest. Read more