fire-retardant shell networking alarm Large alarm volume deterrence,When someone intruded illegally, the alarm horn will make a treble alarm, letting you know where the accident happened. Generally installed in the wall or doorway or balcony and other places, the installation height of 2.5 meters or more. A variety of installation options are flexible and convenient. Widely used in alarm host, gas leak alarm, infrared and other peripheral perimeter alarm equipment. PREMIUM QUALITY - Premium Quality Siren without the Premium Price EASY TO INSTALL - Compact Design. Bracket pivots to 90 degrees. Due to different product batches, the appearance , which does not affect the use Colour:White Material:Plastic Package Contents: 1x Alarm Siren Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.