A Sterling Personal Attack Alarm ideal for anyone who might find themselves in a vulnerable situation such as walking or jogging alone, travelling late at night or working unsociable hours. Small and lightweight to enable the alarm to be carried easily on your person or in a bag. 105db Alarm, activated by a pull cord and pin. For your safety please read the product instructions before use. 3x LR44 batteries included. Pull pin to activate. 105dB alarm. Battery operated. Requires 3x LR44 batteries, included. Always read instructions.