Ultra-Compact, Card-Style Design: At just 0.6 inches thick and 65 grams, these rechargeable hand warmers fit easily into gloves, pockets, or purses, making them the perfect winter accessories for any outdoor adventure, sleek design enhance you warm gear Efficient& Long-Lasting Heat: Enjoy instant warmth in just 2 seconds! With 3 adjustable heat settings, these electric hand warmers provide up to 8 hours of reliable heat each, the palm-friendly design is comfortable to hold. IP34 water-resistant, no fear of humidity Magnetic Pair for Double Heat: 2 pack hand warmers magnetically stick together for easily store and carry—Or separate them for one heater per hand provides double warmth! Plus, they can stick to your fridge as a fun, decorative piece The Ideal Gift for All: Perfect for chilly commutes, outdoor fun, or warming up at home and office, these USB hand warmers make thoughtful winter gifts for men or women who feels the cold. Perfect for Christmas, birthdays, or any occasion Trusted Safety and Quality: Join over 3 millions satisfied customers! Ocoopa hand warmers are UL certified for safety (UL File Number: E535516), made from high-quality materials, and backed by a 1-year warranty