More information about this back support belt Note when use the item: 1.USB Connector heating device is easy to install, Just stick on the waist belt when you do not use heating device directly peel it off 2.Use it an hour when use Heating function , need to stop heaing 15 minutes. 3.Use the voltage for 5V-9V, you can use the phone charger, charge Power Bank, the car USB interface, computer, etc. as a heating power. Most concern about this item is the belt washable and how to washing it? Throw belt in the washer like a normal piece of cloth, preferably alone, and air dry afterward. but the heating device can not be wash. How to check what size to get? Based it on your measurements and compare with the chart in the pictures above Is this effective for low back pain? I've found it to be helpful for my lower back pain. It seems to help my posture and gives some support. Can I wear it under clothes? I recommend use it up the tight shirts,because when you use the heating function you may feel hot
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