The SaferRun Ripcord Siren Personal Alarm is a thumb-sized device that blasts sound in case of emergency. A simple pull of a tab will sound a 120dB alarm that the runner is in distress, as loud as an ambulance siren and audible from over 600ft. This tiny alarm system is a deterrent and can alert others in case of an incident. Beyond that, we are offering core products (waist packs, armbands, phone carriers) with designated storage for the SaferRun Ripcord Siren. Quick-Pull tab for easy one-handed use +120 dB - As loud as an ambulance and audible from over 600ft Reusable - you can test it, try it, and learn how to use it before you ever have to! Cannot be used against you