Hand Warmers Rechargeable, Reusable 6000mAh Electric Hand Warmer, 3 Levels 3S Double-Sided Fast Heating and Digital Display, Slim Pocket Portable USB Hand Warmer, Gifts for Women Men Outdoors - Colour - Black, Our Electric Hand Warmer has an innovative large digital display so you can always check the temperature and remaining battery. Ueuttiy hand warmer is perfect for outdoor activities, shopping, work, gifts, travel, camping and more. This rechargeable hand warmers use super fast charging technology and take just 3 hours to fully charge. But they can provide up to 10 hours of heat to give you a full day of warmth (how long the hand warmer really lasts depends on the level of heating). Say goodbye to traditional disposable chemical hand warmers, these electric hand warmers can even be reused thousands of times, saving money and energy. This hand warmer feels as soft as a baby's skin with a smooth surface and a curved, ergonomically designed body. Rechargeable hand warmer has a built-in intelligent protection system to provide power-on, short-circuit and overload protection. UL, FCC and CE approved and made from high tech aircraft grade aluminium for your safety. it is not only a rechargeable hand warmer, but also an emergency back-up power supply. The large capacity 6000mAh battery and universal USB port enable you to charge your iPhone and Android devices via a USB charging cable for other electronic devices in case of emergency. This hand warmer relieves the pain of Raynaud's arthritis, making it the perfect winter gift. 24-month warranty. Material ; Metal, Charging time - 3 Hours.