Caresst Massage Main PC BoardA Caresst massage chair's main circuit board is an essential part that regulates the chair's functionality, such as the massage mechanisms, heat settings, and reclining features. Here is a thorough rundown of all the information you want on this section: Features Function: Central Control Unit: The main circuit board, or control board, is the chairs central control unit. It processes signals from the remote control and manages the electrical systems