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. COMPLIES WITH PROP 65. 1 1/2" W X 2 3/4" L X 1" H