Carrying better lighting to use with your phone is mostly a non-event. It's just too hard to bother for most people.
So this is a great product for integrating lighting for your phone. The original featured only selfie lighting, but this update gives rear lighting too.
Also handy for just having a much better torch option when you need it and don't just want to drain the phone's battery to use its light that way.
Find out more at LuMee.