HIGH DECIBEL ANTI THEFT ALARM SPEAKER * 12V 110DB tweeter alarm horn , single tone , long volume , wide range , ES 626 provides free technical support , loud and high quality..ADJUSTABLE ANGLE * There is a nut fixed between the horn and the base , loosen the nut , the siren can be adjusted vertically in a small range..ABS FLAME RETARDANT MATERIAL * ABS flame retardant shell network alarm , a large number of alarm volume deterrence. Wear resistance , impact resistance , heat resistance , low temperature resistance , chemical resistance. Rugged and durable , small in size and long service life..INSTALLATION * Generally , indoor alarms are installed in places such as walls , doorways or balconies , and the installation height is above 2.5 meters. When someone trespasses illegally , the alarm horn will emit three high pitched alarms to let you know where the accident happened. Note when wiring: the red wire is connected to the positive pole of the power supply , and the black wire is the negative wire..WIDELY USED * This alarm horn can be installed in various places and can be connected to various alarms. It is widely used in alarm host, gas leak alarm, infrared and other peripheral alarm equipment.