The devices in the list are all for your BGT3620. I would call these "virtual devices". Your device is a dual tuner one, two tuners for you to use. You can record programs from two TV channels simultaneously. Since you use it for DVB-T, you made the correct selection. It is a little confusing that your device is said to be capable of handling DVB-C tuning. My understanding is, this is a hybrid device, meaning you can use it either for DVB-T OR for DVB-C, but not both simultaneously (there is only one physical input connector, so you can't simultaneously hook it to an antenna and to a cable TV connector).
