The detector listening out for gunshots
A US company has developed a system to detect gunshots in buildings and immediately alert the police.
Designed for use in schools, companies and government buildings, the Guardian system relies on a network of inconspicuous white boxes installed throughout a location.
Each box contains a microphone, designed to differentiate between gunshots and other loud noises, and an infrared camera to detect muzzle flashes.
If activated, the system alerts building and emergency personnel in less than a second, potentially reducing the response time of emergency services.
BBC Click's Stephen Beckett spoke to the company's CEO, Christian Connors, about how he hopes the Guardian could save lives.
12 Jan 2015