Winter hand warmer

Winter hand warmer-can make life a little more warm, quickly heat up in three seconds, with a built-in intelligent constant temperature. It can be heated on both sides, double the warmth. Press and hold the power button for three seconds to activate a gear of 43 degrees, and the light will show a steady green. Short press the switch button once to switch the second gear 52 degrees, which is convenient to use. The winter hand warmer can heat up for up to ten hours in the indoor environment, bringing you long-term warmth. The appearance is small and portable. It is a good choice for winter gifts or promotional gifts.