2 IN 1 Portable - Our 2-in-1 hand warmers solve the pain points of traditional, can be used separately or synthesized into one. Warms both hands at the same time, and can also be put in a pocket. Portable - Our hand warmers rechargeable net weight 3.5oz, only 30% of the weight of traditional hand warmers, 30% of the size of the phone, easy to carry, easy to put in pocket. Long-lasting Heating Than Ever - This electric hand warmer adopt a new heating scheme and battery, minimal weight and maximum lasting Heating, provide up to 12 hours of heat. Smart Safe Heating - Our reusable hand warmer use premium chipsets to control the heat levels, the product has passed the safety certification. Fast heating up in 3 seconds, 3 levels of temperature heating. Gift in Winter - Must have to spend a cold winter, nice gift for family and lover. Great for all kinds of outdoor sports and work in winter. Great Gift for Christmas, Outdoors, Hunting, Golf, Camping.