If you are in the winter, you must need the warmer on the hand, my company have designed and produce the handwarmer, at first, it is electric product. So, It is much convenient and comfortalbe anywhere. You only must supply the 5 size two dry batteries or Nickel-hydrogen batteries.
It have the function: As follows
1. Working times: 3~4 hours,
2. Workign temperature: 38~43 degree
3. Product color: Red, black, pink, purple, yellow. Ect.
4. Manner of packing: Vacuum forming box