Featuring a 130dB inside, outside siren. Be assured that this siren has the power to notify neighbors in case of an emergency. This siren is small but powerful. A must have for the larger buildings or homes. It is ideal for added security and protection. Can be placed in a discrete location but don’t let the compact size fool you it delivers a loud siren designed to bring a lot of attention to the area and as an additional siren, you can ensure that the alarm will sound everywhere (not only where you have the internal siren located).