Internal Pizo Alarm Alarm is a part of Alarm Alarm Accessories. The Pizo siren is screenless and the central device is connected to the cable. This siren can be installed on burglar alarm systems and very convenient dimensions can be installed indoors or next to burglar alarm system and in this case you will not need additional cabling and only with red and black cables The device will be connected to the central burglar alarm system. The internal piezo siren is stimulated at 9 to 15 volts DC and has a very good output power of 120 dB. Alarms and alarms are on the elevator controls.The body of this siren is made of plastic and has a poor sound compared to other speakers.