Repeating signal 404MHz
From Signal Identification Wiki
Many peaks from 403 to 405 MHzMegaHertz (MHz) 10^6 Hz, duration 1-2 seconds. Repeating.
Probably a wireless mouse.
Some Radiosonde weather balloons also transmit on 404 MHzMegaHertz (MHz) 10^6 Hz
Nope this is just interference - Arclamp