Effective deterrentEven without a 'real' siren and flashing light, this dummy is an effective means of preventing break-ins. The siren + flashing dummy is mounted outside the building and is a visible sign to burglars that the house is alarmed - for most opportunistic burglars, reason enough to abort a break-in attempt before they even take a step. With dimensions of 19 x 31 x 11.5 cm, the dummy is not only conspicuous, it is also indistinguishable from a signaling device with real functions: Like its real counterpart, the dummy consists of the same weatherproof aluminum housing.