Purchased the run angel to wear while dog walking - for my safety and theirs as well, so many reports of dog kidnapping these days. I think the alarm will be a good deterrent. Haven't used the Guardian Angel facility as no one near me who I can use, but I feel much safer walking just wearing it. It's a brilliant idea, not well advertised though - sure more could be made of it. Understand after 12 (?) alarms, there is a need to purchase more? Not a problem, and hope never to use them, but something purchasers should be made more aware of. Embarrassing moment in the local garage after accidentally setting the alarm off, but not realising it was actually me until a good few minutes later after everyone checked their car alarms. It's certainly very loud!