1.Fast Heating: after pressing the switch for 3 seconds, you can feel the warmth of the temperature spread in the neck for blood circulation and comfortable relaxation. 2. Heating Levels: USB charging, 5V low voltage, safer to use. No battery is needed, just contact USB port devices, such as mobile power, personal computers, laptops, mobile phone adapters, etc. 3.Comfortable Materials & Washable: Our heating scarf uses breathable and ultra-light material. Comfortable cotton with decent elasticity. The whole scarf is waterproof, can be washed repeatedly, easy to clean, not afraid of sweating when using. Even without the battery, the scarf makes a good fashion choice. 4.The Nice Gift: A great Christmas present to keep your loved ones warm during winter. Also great for birthdays and other occasions. Suitable for cycling, hiking, camping, fishing and other outdoor activities in autumn and winter. It's a great Christmas present to keep warm for your wives, husbands, parents, friends or colleagues during winter.