A:AnswerYes the main base can be mounted on the wall the set comes with mounting bracket. As far of how many handsets it depends which v tech you purchase two or four handset I hope this answers your questions
A:AnswerThe CS5129-26 comes with 2 handsets. one that’s sits on the base where the answer machine is and another one that can we plugged in anywhere else in the house. Yes, you can add addition headsets; according to the website up to five additional more.
A:AnswerYou can do it right through any of the handsets. If you refer to the manual it’ is easy to set up. See pictures below.
This may help: On the Handset PRESS “Menu”. using UP/DOWN arrow key scroll down to “Answering Machine “ then Select “Answering Machine” then select “Announcement”. Then follow the voice prompts.