... . warner hand 2. rechargable wamer 3.portable wamer 4.USB wamer portable reusable usb electronic hand warmer detail description as follow: ... capacity rechargeable lithium battery, durable;3,With heating of long duration, convenient charging, multiple functions, wide application4 ... ,special surfact artwork,covered with a thick layer of polyurethane ,more durable ;8,compactness and portabilityProduct ...