?More Practical Design? Double the heating area, especially suitable for the hyperthermia needs of patients with Raynaud's arthritis. The ergonomic design can be held perfectly in your hand and easy to carry to anywhere. Perfect for outdoor sports, camping, hunting, hiking, golf. ?Best Gifts for Winter? This is a must-have to get through the cold winter. Perfect as a warm gift for men, women, seniors and children on Thanksgiving, Christmas, Birthday, Valentine's Day, surprise and love to anyone you care about. ?Safer? Equipped with 6 Safety Protection Technologies, it has passed nearly 100 safety tests. Precise Temperature Control System and more advanced safety features to give you peace of mind when using it. Products have passed UL, CE, MSDS, FCC certification, etc., warm and worry-free. ?Powerful & Durable?3 heating levels can be selected with just a simple button. Whether it's windy, raining or snowing, there's the right temperature rating to keep your hands warm. The 2000mAh*2 capacity battery can last up to 12h*2 of warmth. ?2 IN 1, Double the Warmth?Synthesized into one or use separately, switch freely with the scene. Combined, you can enjoy all-round warmth from palm to fingertips. Use separately, you can warm both hands at the same time. 2 pack hand warmers, giving you double the warmth.