Is the Katana V2X good for gaming?

Yes. It has virtual 5.1 surround, a headphone jack and mic support, and a subwoofer that adds impact to games. It is designed around desk and console setups.

Does it support Dolby Atmos?

It decodes Dolby Atmos, but it is a 2.1 system with virtual surround, not a height-channel setup. Expect a wider front stage rather than overhead effects.

Can I connect it to a TV and a PC at once?

Yes. HDMI ARC, optical and USB inputs let you keep a TV and a computer connected and switch between them. Bluetooth adds a phone or tablet.

How big is the subwoofer?

The subwoofer is about 16.7 inches tall and 9.8 inches deep and connects wirelessly, so it needs floor or shelf space near a power outlet.

Does it have room calibration?

No. There is no automatic calibration, so placement and the app's manual EQ do the tuning.

You get the soundbar, the wireless subwoofer, a remote control and the cabling Creative ships for the inputs. Check the listing for the exact cable set.