Ocoopa Union 5s modular rechargeable hand warmer

This product has four temperature levels, which are dedicated to bringing a customized warm experience to the user. The 360° heating surface can heat up in seconds, and users only need to click the indicator button to adjust the level to get a customized temperature and an ideal use duration. The first level lasts 15 hours, the second 11 hours, the third 8 hours, and the fourth 6 hours. Which is incredibly perfect for the various needs of different users, and the group of people who have joint discomfort will greatly benefit from the four adjustable temperature models of Union 5s.