LED strobe light attachedFor runs, walks, on campus, hikes or cruising the cityAward winning SaferRun Ripcord SirenQuick-Pull tab for easy one-handed use 115 dB - As loud as an ambulance and audible from over 600ftReusable - you can test and try it to learn how to use itAttach to any article of clothing or gear before your runPull to activate if you feel uncomfortable or in case of emergency to alert others of your distressTurn off and use again if neededCase : Plastic (ABS)Electronic component : PCB, IC95% ABS, 5% TPU (alarm)