Computers with wireless internet access will also have antenna radiation, because the keyboard is essentially an antenna  Each key of the keyboard is covered with a vertical and horizontal grid, which itself forms an antenna, and each key is scanned by high-frequency electromagnetic at any time, which can emit a large number of electromagnetic waves
Usually, people only pay attention to blocking the electromagnetic waves in the chassis, but ignore the leakage of the electromagnetic waves of the keyboard to a great extent
There is a problem of antenna radiation in wired computers