If you need to get someone's attention from a long distance away, this is the tool to choose. This hand crank siren emits a powerful 120dB wail that is audible up to 1/2 mile away. Since it is manually operated you wont need a power source, making it an excellent choice for outdoor activities in remote locations. 15in.L x 12 3/4in.W x 17 3/4in.H; includes stand. Item is factory shipped.