Minder Mini Key Ring Personal Attack Rape Alarm 140db with Flashlight + Spare Battery Set - Secured by Design Approved (UK Police Preferred Specification) This product is Secured by Design Approved (Police Preferred Specification) and has also been independently tested by Sold Secure, receiving the Gold Award 140 Decibel Siren with Added Torch Facility. Note: 140db recorded at source, and 130db over 1 meter distance Small size (40mm x 60mm x 12mm). Pull Pin Activation with Separate Key-Ring Supplied with a spare set of batteries.