Human Creations EnergyFlux Enduro Rechargeable Hand Warmer 7800mAh / USB Portable Charger Power Bank Battery Pack with 55lm LED Flashlight Recommended by Wirecutter Two heat settings: 109F (~7 hrs) and 115F (~6.5 hrs) in room temperature (*less in colder temps) Charges digital products via USB, including mobile phones, tablets, digital cameras, etc. Rechargeable 7800mAh lithium-ion battery with up to 500 recharges 55lm LED flashlight and indicator display showing heat level and remaining charge BEWARE of counterfeits. Only products "Sold by TrueToSource US" are genuine and eligible for Human Creations warranty and customer care. <span class="a-text-bold">Double-sided Heating with Adjustable Temperature:</span> Full-grip heating with two temperature settings: Low (109F): 7 hrs, High (115F): 6.5 hrs <span class="a-text-bold">Battery Status Indicator</span>: Indicator lights display remaining power as well as heat settings <span class="a-text-bold">Flashlight Included:</span> 55lm LED flashlight with emergency strobe function <span class="a-text-bold">Power Bank Function: </span>Charges digital products via USB including; mobile phones, tablets, digital cameras, etc. <span class="a-text-bold">Super Powerful Battery:</span> Rechargeable 7800mAh lithium-ion battery It may take a little time for the unit to heat up after being left out in the cold. Heating times are extended with the help of isolation (e.g. placing it in your gloves, pockets or scarf)