Panic alarms are being handed out to Leicester schoolchildren in an attempt to deter mobile phone thefts.
The devices are fitted to the phone and hang from the child's wrist by a cord. If the phone is snatched, a 130-decibel noise is triggered.
The alarm is part of 1,200 packs, with security information and property markers, aimed at 15 and 16 year olds.
Officials from City Watch Leicester said the packs were intended to make teenagers feel safer on the streets.
City Watch co-ordinates anti-crime initiatives in the city and is supported by the council and police.
The city council's cabinet member for community safety and housing, councillor Culdipp Bhatti, said: "This scheme can help play an important role in making youngsters feel safer when they are out and about with mobile phones, which unfortunately can be attractive to thieves.
"I am pleased that the Safer Leicester Partnership is helping support a scheme to deter would-be thieves and promote safe independence for pupils."