Only the mains cable.
With such a valuable device, which is usually purchased to operate it with an equally valuable smart TV (4k, HDR, dolby vision) or a corresponding projector, together with a dolby atmos surround system,
a shielded, certified HDMI cable (HDCP 2.2, audio return channel) should be purchased.
You can determine the length beforehand, rather one metre too long than 15 cm too short, i.e. don't measure to close. And then there are also cables that look "nice" with fabric sheathing and could thus fit in with the colour. The "accessories" are usually short, if they are included.

Only the power cable. I had to order the high-speed HDMI cable separately. hoepf

Only the power cable. No HDMI