A man was jailed after his ex-partner activated a personal safety alarm given to domestic abuse victims, fearing he was about to attack her.
The man, who was subject to bail conditions not to approach her, arrived at her home drunk and swearing.
GPS technology built into the unit helped police locate her quickly once the alarm had been set off.
The devices were given to some victims of domestic abuse in Tayside as part of a six-month pilot.
The man, who has not been named, was remanded in prison over Christmas for two breaches of the peace and a breach of his bail conditions. He has since been convicted at Perth Sheriff Court.
The victim, who did not wish to be identified, said: “My estranged husband had forced his way into my house and I was able to use the alarm and police arrived very quickly.
“It has meant that I feel safer not only within my home