Features： 1、Good Neck Warmer: This rechargeable neck heater can quickly heat up in a few seconds. Used for neck spasms, arthritis, relieving pain, stiffness, and muscle tension. Suitable for adults and children to enjoy the warmth of winter. 2、Quick Heating and Adjustable Temperature: Long press the switch button to start heating. It can immediately provide you with heat in a few seconds without waiting too long. 40?55℃ can be freely adjusted. The current temperature will be displayed digitally on the left screen. 3、Handsfree and Portable Design: The intelligent neck warmer is a wearable design that frees up your hands and allows you to do everything at once. Suitable for use in offices, camping, hunting, skiing, fishing, shopping, heating, travel, and more. 4、 Effects: Conductive hot compress effectively promotes circulation, relieves shoulder and neck pain, and alleviates discomfort in the knee due to old cold resistance. 5、 Winter Gift: A portable neck heater will be an present for women and children in outdoor cold winters, Christmas, birthdays, festivals, anniversaries, celebrations, camping, hunting, skiing, fishing, and more. Your family, loved ones, and friends will be happy to receive it. Specification： Item Type: Heating Neckband Battery Type: Lithium Ion Battery Battery Capacity: 6000mAh, shipped with built in battery. Heating Range: 4 levels of 40℃, 45℃, 50℃, 55℃. Package List： 1 x Heating Neckband 1 x USB Cable 1 x User Manual