[AUTONOMOUS ALARM alarm]: On-site alarm with a powerful siren up to 110 dB, coupling with door / window sensors, PIR motion detectors to form an efficient and autonomous security system for apartments. _x000D_ [DURABLE DESIGN]: Flame retardant ABS housing, widely used in alarm host, air leakage alarm, infrared peripheral alarm equipment This product was designed with protection technology against fire and its housing is resistant_x000D_ fire. _x000D_ [SAFETY HORNS]: The 12 V home tweeter can be connected to various alarm systems. When someone interferes illegally, the horn sounds three times to indicate the place of the accident. _x000D_ [EASY INSTALLATION]: The installation options are flexible and convenient, Generally installed in the wall, doorway or balcony and other places, the installation height is equal to or greater than 2.5 meters. _x000D_ [ALL PETIT & amp; PORTABLE The]: The product is small, flexible and easy to carry. So you can easily take it where you need it, fix it and it will work for you.