This is the job description http://www.direitoshumanos.aac.uc.pt/index.php/penatropin-mexico-d761.pdf cons of penatropin  "We use this property of the structure of the hydrogen atom to create a fundamental time reference for us that transitions between two states of the electron in a hydrogen atom," Marrone said. "It creates a low-frequency signal that through careful design you can make a very precise oscillator. It creates very perfect oscillations for a short time period. That means we can average our data over those time periods because they will all have kept time very perfectly."