What it does is it vibrates and sends a constant throbbing sensation through the penis and somehow (I’m not a doctor so I’m not sure about the mechanics) it helps you last much longer before ejaculation occurs.
If you are in need of spicing up your love life then maybe a Vibrating Cock Ring is just the thing for you.
I am running the 2018 London Marathon to raise money for Livability UK in memory of my dad. If you can I'd appreciate any donation you can spare. http://uk.virginmoneygiving.com/deansaliba