Car alarms with keyless entry

Keyless entry (GSM)

— alarms of this type work without key fobs at all; the specific method of control may be different. So, many of these models are equipped with a GSM module (see the relevant paragraph) and are controlled from a mobile phone; others operate via a label (see "Features — Hands Free (Label)"); still others receive commands from the buttons on the ignition key, etc. In this case, communication can be both two-way and one-way, depending on the control method and the features of a particular model.