Rechargeable 2-Pair Hand Warmers With Ai Temperature Control And Pocket Size For This is a 2-in-1 rechargeable hand warmer with a 5200mAh battery capacity, which can last for 12 hours. A reusable hand warmer with 3-second heating and three-speed heat regulation, suitable for use in winter outdoors, at home, at work, camping, skiing, hunting, fishing, dog walking and more, also the perfect holiday gift for family, friends, lover, partner 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.