A radio. Software Defined Radio, pretty cool technology. And CQ, that's coming from the chimney, is a code used with Morse code, I think it's when looking for someone to chat with on the air, if I remember correctly. When listening to HAM bands, you often hear the Morse code translating to "CQ CQ DE ******", where DE means "from" and ****** is the code for the individual HAM operator calling.

I have a RTL-SDR, a cheap, receive-only SDR that only cost about €/$20, at least when I bought it a few years ago, but, together with a computer and a suitable antenna, which can be made from a wire of suitable length depending on what frequency you want the best reception at, can receive all kinds of signals, including several HAM bands, regular FM and AM radio, wireless devices like thermometers and remote switches, etc. Fun for many hours/days/weeks/months/years depending on the user.

Weird formatting error made the asterisks two instead of six.