Data accessing structure and method for flash memory is disclosed. Data is bi-directionally transmitted between the measurement module and the transmission unit located within the near field of the measurement module by use of a second antenna that is arranged on the measurement module. The flow volume controlling device is provided with the flow meter, a controlling valve, and controlling means for adjusting the flow volume of a fluid that flows through the flow path of the flow meter through controlling the controlling valves based on information regarding the flow volume detected by the flow meter. The first reinforcing member has a planar surface and a first reinforcing edge. The second wireless device may begin listening for the beacon message in response to powering up.