This heated coccyx cushion can be used at home or in your car. This heated coccyx cushion helps me so much when riding in a car. It can be a short trip or a long trip and I always have problems with my tailbone hurting. I have degenerative disc disease, scoliosis, and my tailbone is about an inch or so too long so I have problems that cause me extra discomfort. I love memory foam so I really love that this cushion is made out of memory foam. For me heat also seems to help when my tailbone is hurting so I really like that this has a USB cable so you can connect it to your USB port in your car and have the heat on if you want. When I am at home I can plug it into one of my many USB ports that I have. I typically need this cushion when I am sitting at my desk working on my laptop. And since my laptop has a USB port I know that there is one readily available if the rest are being used. The cover for this cushion can be removed to wash and is hypoallergenic and dust mite resistant.