yes you can send promotional SMS using Innoventry
go to Tools
> Promotional SMS
Now SMS dialog get open,
select Ledger group(it is mandatory).
select city ,label(if you want to select).
Write text of SMS.
click on OK
Note 1. you need to purchase the SMS gateway from outside.
(if you don't know anything about that and want to purchase SMS then you can contact to Innoventry support team.)
2.Go to Setup > Configuration > SMS Setting enter the details of SMS gateway