Come and see our amazing products. the rechargeable hand warmers,it has USB charging port,weight 112 g,heating temperature:40-60 adjustable. one treasure dual-purpose, USB hand warmers, mobile phone charging treasures, aviation aluminum materials, skin friendly design, double sided heating, intelligent temperature control, scientific power supply, waterless charging, warmth and safety, 3600 mAh lithium battery with large capacity, ceramic heating technology, 360-degree insulation, lasting 5-8 hours, constant temperature. This handy promotional item can be laser engraved to give your brand great visibility during its frequent use. Take advantage of a great way to spread the news about what your brand is offering. Your clients will love walking away from you with this. Pls confirm with us about the packing info, stock color and exact production time before placing your order.