Perfect Article compliant and works very well! One charge lasts about 15 days. Charging via usb. Once put on the back, put on with the back straight and adjust the straps, press the button holding for a few seconds, there will be vibration. Which means the right position is recorded. It's gone! Now that we fall down, as soon as the shoulders are not straight, sags, vibration there is! That's great! It's a little tiring at first but it's normal, I advise you to start the first 5 days for 30 minutes then 5 days that follow 1h then the 5 still following 2h. After you see according to your needs but by doing so you will sharpen less your back. Delivery is fast in France! Perfect

The goods are received by free and this is my first win. I work a lot at the computer, so it became usual to narrow down. I am very pleased with my winning. Everything works. At the first start, you need to correctly select the location between the blades. Next, when used, there is vibration and... You control the position of the spine. Long enough delivery, so be patient. Thanks to the seller for the product.

Cool! I won something for the first time in my life and I'm very happy)) thanks to the seller!!! Delivery is fast, how to customize has not yet figured out, but very satisfied)) later I will add a review, but I recommend the goods and the seller

Excellent product. It meets all my expectations. Good quality. Very useful. It works very well! Communication with the super seller. And the shipping time exceeded my expectations.

Delivery is quite long, but the device works well.