EnergyFlux Ellipse 5200mAh Rechargeable Wrap-around Hand Warmer / USB External Battery Pack - Electronic USB Hand Warmer with Power Bank - Best Christmas Gift - As seen on NewYork Times, TV Shows WARM HANDS FOR MORE COMFORT IN JUST A VIEW SECONDS - Doublesided Hand Heaters warm on both sides of the unit to keep your hands toasty with fast heating ADJUSTABLE TEMPERATURE - Two heat settings: 107F (~6.5 hrs) and 118F (~5 hrs) in room temperature (*less in colder temps) POWERFUL BATTERY WITH POWER BANK FUNCTION - Recharge your devices like digital products, including mobile phones, MP3 players, digital cameras, etc. SAVE MONEY AND REUSE YOUR POCKET HEATER - Long Capacity Rechargeable 5200mAh lithium-ion battery with up to 500 recharges makes your life easier and is environmental friendly RANKED AS NO. 1 Hand Warmer by Wirecutter - High-Quality product with 1-year warranty - Winner of many hand warmer rankings and recommended by Raynaud's Association!! The EnergyFlux Ellipse features an easy-to-grip shape and size with plenty of battery power to keep your hands warm and toasty for hours. With two temperature modes set to 107F and 118F, wrap-around heat and fast warm-up time, EnergyFlux Ellipse is a snap to use and will have your hands warm and comfy in no time. The EnergyFlux Ellipse is rechargeable, so its ready to go again after a few hours of charging. No more throwing out hand warmer pouches that just end up in landfills. No more fussing with lighter fluid and trying to light catalytic warmers with cold fingers. Outstanding Battery Power with a 5200mAh battery that can provide up to 6.5 hours of heat on low and up to 5 hours of heat on high! Easy to use with just one button. Press and hold the button until the LEDs light upits on! Once on, a quick press of the button will switch between high and low heat. The red LED will flash to indicate the Ellipse is warmingslow for low heat, and fast for high heat. Blue LEDs will let you know how much power is left. Its also easy to check the battery level anytime: Just give the button a quick press, and the LEDs will light up to show battery status. Power Bank Function included. The Ellipse also charges your phone and other devices! Just plug in the included USB cable or the cable that came with your phone to provide 5V USB power which is standard for nearly all smartphones and dozens of other devices. LEDs on the Ellipse will indicate that it&#039;s charging and how much power is left.