Worldgrowing 6-12H Double-Sided Heating Hand Warmer|fast heating

*Warm You Every Day: Always get frozen fingers in winter? Want to go outside but it's too cold? Our reusable hand warmer can change that, 5 seconds of rapid heating, double-sided heating, low and high-temperature modes, and long-term heat enable it to warm you every day. *Safety Ensured &Smooth Surface:Your safety is our top priority. This hand warmer uses a premium chipset to control the heat levels, no liquids, and flame retardant materials to ensure product safety. And covered with aluminum housing, the portable hand warmer has a smooth surface and gives you a comfortable touch. *Relax Your Body:This electric hand warmer can relax your body with vibration, suitable for the neck, arms, legs, calves, thighs, shoulders, back, waist, and feet. And while relaxing the body, it can continue to heat warm you *10000mAh Large Battery Capacity: With a 10000mAh battery, the hand warmers can last up to 12 hours to keep hands warm. And this large power hand warmer can also be used by your pho