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  • Comfort & Safe: Fourheart rechargeable hand warmer made of high-tech aircraft-grade aluminum and ABS material, thousands of polished exterior material, smooth and warm, portable and compact. Eco-friendly Lithium Ion Battery, Shockproof, Anti-scald, Anti-skid, Explosion-proof, Radiation-free, Green and Healthy heat transfer.
  • 4 Temperatures Levels Design: Press the switch 3 Seconds and instantly release the warmth for you. Rapidly warm up double sides in 3 seconds. 4 levels of temperatures 95-100.4°F(use for 11-12 hours )/100.4-107.6°F( use for 9-10 hours)/107.6-118.4°F(use for 7-8 hours)/118.4-131°F(use for 5-6 hours) for your choice.)/118.4-131°F(use for 5-6 hours) for your choice.
  • Large Battery Capacity: 5200mAh lithium ion rechargeable battery with USB Type-C charging port ensures fast charging. It can also used as a spare power bank to charge your electronic device(when needed). It has been over-voltage, over-current, short-circuit protection, so it is safe for you to use.we have updated the hand warmers for 5 times, so it is more powerful and heating longer time.
  • Hand Warmers/Power Bank 2in 1 and Great Solution For Raynaud’s&Arthritis:Not Only This really helps warm up your cold hands and gets the circulation going, great for relief of aches & pains. Best Gifts for Friends and Family in cold winter, but also It can charge for iPhone 11, 11 Pro, XR, XS, 8, 7, 6s, 6 Plus, Huawei, Samsung Galaxy and others Android phone.
  • After-service : Fourheart usb hand warmer offer a 60-day return policy and1 years promise, when you are not satisfied with our product, please don’t hesitate to contact us.

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