This is designed to store massive amounts of energy from the ambience and excessive junk energy build up around you.
All this energy will be purified and stored in an ever expanding storage pocket.
You can also direct from where you want energy gathered to be stored, perhaps you are walking around in nature and encounter some wonderful high level energies. You can direct the ring to store this energy for later use.
While wearing it, it will continuously provide this storage service.
It will also automatically use that energy to augment and psychic work/ magical work / energy involved work that you are doing.
it does this on a mild automatic basis but you can increased the output to suit.
The versatileness of this if left to your own imagination, perhaps you simply need to energize your legs for to aid in increasing
your running speed or muscle recovery.
Maybe you are wounded and need that extra push to boost your healing and recovery speed.
It may be that you are a healer and need a boost to your energy transfer for a more effective working.
It is up to your imagination.
I suggest working a bit with it to figure it out and gauge your own levels.