How does the lone worker function works on Retevis RT3S

"Lone Worker" gives a tone at regular intervals to which the lone-worker needs to respond by pressing the PTT button. If the worker fails to respond, within the pre-defined time, the radio will then go into emergency mode, and help and support would be sent to them.

[@victorcharlie7491]

That's a very good potentially life saving feature, I love my HD1.

[@DEIMOSWAR]

Este sería lo mismo que el HD1 Ailunce o en que se diferencian?
Cual sería el mejor y más moderno?

[@Ailunce]

HD1 only has a lone worker function, but it does not have an emergency system.