If you are talking about the inner token functions, a simple explanation would be people depositing ethereum on one pile and getting a share of that pile called Hertz Token. As soon as a transaction is made or Hertz converted to ETH within a contract, a percentage of ETH stays on that pile and everyone profits from it.  This way it can create arbitrage with exchange and is also always increasing in value in respect to ethereum. As a result, it is a stable coin with an always-increasing price (in respect to ethereum).

More can be found in a white-paper. https://github.com/olejardamir/Hertz/blob/master/readme.md