We all have this question somewhere, sometime in our lives.
What connects us with God?
How do we communicate with Him?
Simply put; We just can when we want to have a relationship with Him.
Alright so this pendant explains a bit more in depth if you want to get technical.
We have God the Father, God the Son, God the Holy Spirit. This is the trinity in the spiritual realm (Top Triangle).
Us humans have a Body, Soul, and Spirit (Bottom Triangle).
This is where it gets interesting... Our body you can say is our vessel for our Soul to move in (almost like how we drive a car/robot). Our soul is our conscience or to put it straight "Our true form". Then we have the Spirit, as God gave us a spirit so that we can live internally outwards, not outwards to inwards (recipe for identity crisis).
What we have in common with Him is the Spirit. And that's where we get together! In our subconscious what we hear is the Spirit communicating with us (or trying in some cases).
Let this symbol/pendant be a reminder that we're never alone and that we do have a connection with God. He wants to have a relationship with you, and He also accepts you as you are.
Because we have the Holy Spirit in us, we can talk / communicate / worship Him anytime and anywhere.