The VU+ Duo 2 usually comes with 1 twin tuner card, 2xDVB-S2 satellite tuners, but does have an extra tuner slot for 2 more DVB-S2 tuners or a DVB-C/T/T2 tuner.
Witht eh 2 DVB-S2 tuners, and a twin LNB you can record a number of channels, at the same time, using a fixed dish, multi LNB set up, or a motorized dish, and at the same time record from your DVB-C tuner, using an internal, or external, hard drive. The Duo 2 can take either a 3.5", or 2.5", internal SATA hard drive.