Operating Instructions RolloPort S2 RP-S2-700N F. Tepaße Updated April 03, 2024 14:52 Follow Download PDF Related articles Operating Instructions RolloPort SX5 DuoFern RP-SX5DF-900N-3 How many hand-held transmitters can be registered to the RolloPort? The RolloPort S4 no longer responds to the pushbutton and hand-held transmitter. Only the lighting flashes several times. No motor movement. What is the range of the DuoFern system? Are there repeaters for the DuoFern system?