OCOOPA Hand Warmers Rechargeable 10000mAh, Magnetic USB Heater, All-around Heat Max 58℃, 4 Heat Levels, Compact & Durable, for Golf, Hunting, Camping, Cold Weather, UT3 PRO

【Smart Magnetic Tech】 Real double-sided Heating hand warmers is coming! Upon snapping, the external side continues to heat while the internal heating is paused to ensure safety and energy efficiency. When separated, both sides activate heating, providing all-around warmth.
【Longer Lasting Warmth】Upgraded 2*5000mAh rechargeable battery capacity and performance, enjoy up to 15 hours of continuous heat, suitable for all-day outdoor activities. Also functions as a power bank, capable of charging your phone over 3.5 times.
【Best Warming Experience】Upgraded with 4-level temperature adjustment, 3S quick heating, This electric hand warmer offers a wider temperature ranging from 38°C to 58°C(100-136°F). We simplify your operation by remembering the previous heating level you selected and switching to it the following time.
【Ultimate in Ergonomics】Through hundreds of refinements, Just for a comfortable grip. You'll have an awesome grip feel a with velvety smooth surface and slim waist in hand.
【Durable and Safe】 Advanced materials and officially certified batteries ensure absolute safety and last longer and stronger than ever. This hand warmer with USB-C charging port supports fast charging and fully charges in only 3 hours.