You can program Mercari lone worker alarms with up to 10 nominated contacts, depending on your configuration. This lets you set a clear escalation list—such as a supervisor, site manager, after-hours responder, or control room—so alerts reach the right people quickly. When the SOS button is pressed (or an automatic event triggers), the device follows the contact sequence you’ve set and can include key details like the emergency notification and GPS location link to help responders act fast.
How many contacts can I set?
by Lone Workers | Jan 14, 2026