H1B transfered, can spouse travel on Old H4 Visa?

[H1VisaUser]

I travelled to US with Emp A visa which was valid till End of Dec 2016. Recently i changed employer from A to B and H1B got transferred successfully without RFE. So I am working with emp B now.
My wife has H4 (against my Old employer - Emp A) which is valid till End of Dec 2016. She has never travlled to US before OR on that visa.
1) So now as my H1B got transferred from Emp A to Emp B, can she travel on old H4 (Emp A) visa?
2) What else she needs to carry while POE?
3) Will they ask any questions regarding my employment change? Reason?
4) Do I need to get her passport stamped again with New H4 (against Emp B)

[H1VisaUser]

I travelled to US with Emp A visa which was valid till End of Dec 2016. Recently i changed employer from A to B and H1B got transferred successfully without RFE. So I am working with emp B now.
My wife has H4 (against my Old employer - Emp A) which is valid till End of Dec 2016. She has never travlled to US before OR on that visa.
1) So now as my H1B got transferred from Emp A to Emp B, can she travel on old H4 (Emp A) visa?
2) What else she needs to carry while POE?
3) Will they ask any questions regarding my employment change? Reason?
4) Do I need to get her passport stamped again with New H4 (against Emp B)

experts please advise....

[SKDS160]

experts please advise....

Your spouse may travel on old H4 visa if it is still valid. She has to show I797 approval of new employer at POE.

[H1VisaUser]

Your spouse may travel on old H4 visa if it is still valid. She has to show I797 approval of new employer at POE.

Thanks a lot SKDS160. I appreciate your response.
I797 copy (and not original) is enough right?