The sleek, slim design of this personal alarm fits easily into small hands, purses, and even a pocket. Dimensions: 3.5" x 2.5" x 0.5". The activation pin is connected to a wrist strap and when the pin is removed the alarm sounds at an ear piercing 130 dB. The alarm is also equipped with a flashlight, useful for dark parking lots or when entering a dark building. Perfect for real estate agents, nightshift employees and even children!!! Uses two (2) AAA batteries (included).