for all Lutrons instruments which are built-in the RS-232 interface.
select button #1 : UPCB-01 used
select button #2 : UPCB-02 used
USB-01 1ea Data Aqusition Software 1copy (SW-U801, for YK-2001series) * 옵션 : Data downloading software 1 copy (SW-DL2005, for YK-2005 series)