All are IPX5 so for splashes but not forced water so good for accidental spillage.
Soundcore Boost:
20Watts speakers, 5200mah battery, can be used as a portable charger (1A output)
Manual: https://fccid.io/document.php?id=3315776
Photos: https://fccid.io/document.php?id=3315773
Soundcore Select
12W speakers
Manual: https://fccid.io/document.php?id=3314430
Photos: https://fccid.io/2AB7K-A3106
Soundcore Pro
Like the Boost has 5200mah but can charge at 2A output, 20W speakers.
Photos: https://fccid.io/2AB7K-A3142
Manual: https://fccid.io/document.php?id=3247675
Now as to when available I donât know but if you look at say the Soundbuds Slim launched Feb 19th and tested by FCC on Dec 29 you see a rough 6 week gap hence the March 14th testing would extrapolate to late April.