These corduroy hand warmers are safe and comfortable to use with intelligent protection against overvoltage, overcharge, and short circuit. They offer fast heating in just 3 seconds with 3 heat settings to choose from. The rechargeable 10000mAh battery can warm your hands for 8-12 hours and serve as a backup charger for your electronic devices. Portable and versatile, they make a great gift for cold weather and outdoor activities. Features 1. Safe & Comfortable: The hand muff warmers are built-in intelligent protection system keep it away from overvoltage, overcharge, and short circuit. Made of high quality corduroy material, the electric hand warmers are super soft, skin friendly, warm and comfortable. 2. Portable Design: Equipped with a iron chain and a pocket design, the rechargeable hand warmers gloves are easy to carry anywhere, perfect for sporting, fishing, hiking, camping, skiing, golf, travel or play sports outdoors. 3. Double-Sided & Fast Heating: Cordless heating pad adopts efficient graphene and double-sided heating design, fast heating up in 3 seconds and release the warmth for you. 3 levels of temperatures for your choice. 4. Winter Warm Gift: USB hand heater not only can warm your hands and body in cold weather, but also can help relieve pain. It is a great warm gift for Thanksgiving, Christmas, New Year and birthday for your family and friends. 5. Large Battery Capacity: Reusable hand warmer with 10000mAh dual USB portable charger continuously warms your hands for 8~12 hours. It can also be used as a backup battery to charge your USB electronic device at same time. Specification Material: Corduroy Color: Yellow, Purple, Green, Red, Pink, Gray Size: 36 x 24 cm Weight: 100 g Wattage: 4.5 W Rated Voltage: 5 V Heating Time: 8~12 hours Package Include: 1 Hand Warmer 1 USB Charger