This Personal Alarm with Flashlight has an ear piercing 130dB. It has a sleek design that allows it to fit into small hands, purses and even a pocket. The dimensions are 3.5 inches x 2.5 inches x 0.5 inches. To activate the personal alarm just remove the pin that is inserted in to the unit and attached to the wrist strap. The flashlight on the unit is useful when it is dark out side and you have to go to a parking lot or enter a dark building. This unit and any other personal alarm we sell, is perfect for real estate agents, college students, night-shift workers and even children.