But the product is good ...

The cuff itself is in good order. A beautiful silver color, it is reflectorized what is good for night joggers safety. The Velcro is adjustable for late or bigger arms. The Galaxy S5 slips in smoothly if no protective shell. With a thin shell of silicone that again goes to insert but the output is really painful.
The transparent plastic which acts as "glass" is not snug on the phone screen as for all the cuff so I assume the tactile handling is rather laborious. We must hurry to click or drag.
in fact I have not nothing wrong with the product itself it's just that I've realized that a cuff was not appropriate given me the size of my phone on my arm.