Why on earth would anyone want to buy a security system from some caller they do not know calling from a thousand miles away? Run away!!!! This number is now blocked.
Called them back from a Google Voice number and it goes straight to a bot. You can press 1 to connect to a representative (which plays some music for a second and then goes straight to voicemail), or you can press 2 to be "removed from their list" which I wouldn't trust (and when you press 2, it says it takes up to 48 hours). Best to just block this number and be done with it.