This is a massage device that stimulates the lower back using EMS (low-frequency electrical stimulation). You can choose from 16 levels of intensity. It's USB rechargeable and lightweight, making it easy to handle. I bought it in February of this year, but it wasn't what I expected, so I've only used it a few times and it's in near-new condition. There are no scratches on the product. The original box and instruction manual are all included.