The present invention provides a liquid crystal display panel and a 3D image system. Generally, the subject devices include a sampling means configured to pierce a skin surface to provide access to biological fluid and concentrically-spaced working and reference electrodes positioned within the elongated sampling means that define an electrochemical cell for measuring the concentration of analyte within the biological fluid. Additionally, interference occurs between the respective streams. These actions may be performed between startup and shutdown of the power system. After the predetermined period has expired the method determines that there are no protocol data units scheduled for transmission or re-transmission and that there is at least a transmitted PDU that the poll function was triggered by a \u201cLast PDU in buffer for first-time transmission\u201d trigger, and selects a PDU to schedule for re-transmission to fulfill the poll function. The impedance presented to the output of the first RF amplifier is equal to the input impedance of the second path which may be optimally set for maximizing power added efficiency or output power in LP mode.