My singing voice is such that I figure I should be banned from karaoke. Still for the likes of Zoom calls I did take an interest when I saw a rechargeable "karaoke microphone" (available in white, black, and pink) with Bluetooth for $5 (plus tax) at Dollarama. So, I bought one in black, charged it, and connected it via Bluetooth to my Debian Linux (13, aka Trixie) desktop PC. What initially puzzled me was my PC didn't see the "karaoke microphone" as a microphone, it saw it as a speaker. The idea being I take it that you play whatever background music you want and then sing over top of that. When running the "JuK" MP3 player program I found the "+" / "-" buttons on the "microphone" would let you step forwards / backwards through the audio file collection. Besides the power on/off button, the "+" / "-" buttons there is a button with scissors on it (mute) and one labeled "M" (untested, but I gather it is for "duet" mode), On the bottom of the "microphone" is a microSD card slot (I presume for loading with background music files, I didn't test this). With the microscope was included a very short USB A to USB C cable for recharging the "microphone". As noted, I am not a karaoke person, but while not for me, I can see a place for this. I am used to thinking of karaoke set-ups being big / complex, but one (or more) of these "microphones" plus a small laptop PC and you could be off to the races (assuming you don't need massive volume). Or even one (or more) of these "microphones" with microSD cards plus a booklet of song lyrics and you might have a karaoke system in a large pocket. I can also picture these "microphones" being nightmare fuel for parents on a long road trip with their kids :-) ...