I received a slightly different key the picture: two mini-connectors for the antenna, without plug 9.5 female in the back of the key. The connection to the antenna is via a cable (supplied) 9.5 female / MCX twin that did not seem to bother the reception, even if both tuners are connected to different muxes: very good point.
Beware though, it seems that the signal quality becomes catastrophic if the key works 24/7: think let breathe out broadcast / recording (on HST: uncheck "idle scan", I also disabled the device support in an idle period in case).
This is the only problem I have found and that is how I solved; it is possible that it will have nothing to do with the product!
Little tip if you already have a tuner and your / dev / dvb / mix with each reboot: no need to redo all the udev rules manually, just write a rule (in order to be ./10-* considered before the others) calling for the establishment of a can symlink (/ dev / dvb / dummy 0-for me) for your first tuner so that it is taken into account before the others and always arrives on / dev / dvb / adapter0.
It's a hack, it is undoubtedly fragile, but it works and it is adaptable if you have even more tuners.
