Waist 27-29” Hip 37-39” Heating Performance • 4 carbon fiber heating elements (left & right pocket, collar, mid-back) • 3 adjustable heating settings (high, medium, low) • Up to 10 working hours (3 hrs on high heating setting, 6 hrs on medium, 10 hrs on low) • Heat quickly in seconds with 7.4V Mini 5K battery Battery Performance • 7.4V output to expedite preheating • UL, CUL, CE, FCC, and RoHs certified for safety and quality assurance • Versatile USB-C port for battery charging and a USB port for other device charging • i Fully charged in 4 hours with any 15W (5V/3A) charger (not included) • USB charging cable is included • Powered by LC battery cells • Capacity: 4800mAh/7.4V/35.4Wh • Weight: 6.53 oz (185 g) Stand-up heated collar provides warmth on the neck • Two exterior zipper pockets to store your personal belongings • Durable zipper with a zipper cover for extra protection • Lightweight insulated for you to wear in many ways with unrestricted movement • Ripstop shell makes it more resistant to tearing and ripping • Lightweight, yet insulated, so you can wear them with or without a jacket.