Ultra Thin 20000mAh Power Bank Dual USB Ports External Battery Portable Charger sold separately. 
Item Number PBPCD

Banded H.E.A.T. Insulated Liner Jacket - Short Liner (Heated-Element-Activation-Technology). Finally, electronic heated gear that works. Featuring tri-zone multi-level heating with two elements in the chest and a large back element. Filled with 100-g of PrimaLoft silver premium insulation and wrapped in a windproof shell fabric with Durable Water-Resistant (DWR) finish. Equipped with integrated iPhone charging cable accessed inside zippered chest pocket, warmth-sealing elastic cuffs, two zippered hand pockets, two zippered chest pockets, adjustable drawstring waist. *Batteries not included.

• Tri-zone heating with two elements in the chest and a large back element
• 100-g Primaloft silver premium insulation
• Windproof shell fabric with Durable Water Resistant (DWR) finish
• Integrated iPhone charging cable accessed inside zippered chest pocket
• Warmth-sealing elastic cuffs-Two zippered hand pockets
• Two zippered chest pockets-Adjustable drawstring waist
• SHORT option conveniently zips into the shell of Banded White River Wader Jacket

Power on. To turn on the product, simply press and hold the heated power button for about 3 seconds. The light will glow red indicating that the power is on. To adjust the temperature setting, single press the power button to cycle through the corresponding LED lights. To turn off the product, press and hold down the power button for about 3 seconds and the LED light will then turn off. 

• RED LED: High Temp
• ORANGE LED: Medium Temp
• GREEN LED: Low Temp