Energizer Panic/Emergency/Self Defense alarm and LED light with 115 decibel Alarm 105dB Emergency - Panic and Attack Alarm - extremely powerful Survives 1 metre drop test and bright white Nichia LED never needs replacing 2 hour 40 minute LED run time -11 minutes alarm run time Great product for elderly, students, police officers, walkers, joggers, lone workers... Includes replaceable battery (1 x A23)