This charges via the provided USB cable, however you'll need a USB charging block or USB port in a receptacle as it only comes with the cable. This charges up pretty quickly and lasts a long time. I wore it the entire time we watched a movie and it only went down about 10 percent in the charge. The only thing is the reading is in Celsius, and I'm used to Fahrenheit. But, I set it at 50 degrees C and it felt really nice. It does not get too hot in any spot, it just warms your whole neck. This is very relaxing if your neck is stiff. I am also looking forward to using this in the winter when it's cold outside to help keep me warm. This is a nice, well made, and comfortable product.
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