Hi Yael

Thats ok you can ask all the q's you want

I have an AngelSounds one it works great Has a recording cable with it too which can also be used to plug in a 2nd set of headphones. The AngelSounds one works from 12 works like most of them do. I got mine when I was 15 weeks I think and I could hear the HB then. It doesnt show the FHR you have to time it yourself.

Hope that helped.