EDIT: I have recently bought another pair of these in white as I was so impressed with my previous pair, which unfortunately started to become faulty. Loved the support and I?ve tried so many good shoes. I received a replacement and had hopes the first one was a fluke, but it wasnt so. It charges my phone up so fast! However, assembly is not easy. El reloj no viene con plásticos protectores en la caratula, ni en el sensor; por eso en un principio creí que me habían enviado un reloj usado, después revisé videos y vi que así los venden. I am now in my mid-70s and still playing club tennis and local tournaments. THE PRODUCT ITSELF (THE EARBUDS)The closing lid slides open, and when doing this the leds on the front will burn shortly and the earbuds themself will start looking for your device and the light on the earbuds will start flashing fast. Perfect for masks and hats and gloves! When I used a house brand body wash, my skin was all dry afterword and had to be rubbed down with body lotion.