Traveling out of country after biometrics

HELLO,
My husband filed H1, H4 and H4 EAD under premium process,
got the H1 extension(approved) also got the appointment date for Biometrics,
My question is I need to travel to India(H4) to check on my parents health,
Can I travel once done with biometrics( have a valid stamped Visa until oct 2019)?
Please let me know

You can travel and come back, but you would need to re-apply for H4 extension and EAD, if you travel as your I-94 would be closed on exit and you would get a new i-94 on re-entry. Check Travel out of US with H4 Pending.

Thanks for your reply.
One last question …As I have got the biometrics appointment , how much approximate time does it take to recieve the decision on H4? ,

Well, we do not have enough data. So far, for one of the users reported, it took 45 days in Vermont for H4 from the day they sent application… Check H4 Biometrics Experiences Comments