Itās all surface fixed and wireless too, so there is no chasing out needed and it can be retro-fitted.
They do smartphone alarms as well, but we were worried about the lack of guarantee for the continued support of the apps needed to work them:
http://www.yale.co.uk/en/yale/couk/productsdb/alarms/smart-home-range-/
If our one goes off I get an automated phone call. The one we went for is not a monitored alarm, and doesnāt call through to the police, but the former will have a charge, and neither will guarantee that the police will actually come out anyway, so we went for the one we did.