Two built-in LED lights to help in dark/low light areas. The carabiner easily clips to keys, bags or purses. Simply press the button for light on/off. You activate the emergency alarm by simply pulling the pin. The alarm is 100-110 decibels and can be heard up to 175-225 feet depending on surrounding conditions. Light has a beam distance of 19M, is impact resistant up to 3M and has a brightness of 3 lumens.