... Multi-CA+PATCH OPenbox series:openbox F300,openbox F500,openbox 800,openbox 810,openbox 820,openbox 730,openbox 750,openbox 770,openbox 540,openbox 590,openbox 820..Common interface ... .1 LNB input,IF Ioop through for 2nd receiver.Variable input symbol rate 2~40Msps.Auto satellite ... supported.RS 232 downloading.Data transfer/receiver-to-receiver and/or PC-to-receiver.12/18V LNB switching/ DiSEqC Version ...