Exit Alarm Cylinder, Keyed Different

hello my friends I am Shawn this is a fix my home Channel today I want to show you how the emergency exit alarm is working so it's supposed to when you push the panic bar the supposed to son's come home yourself but in this case is not coming on so this panic ball they have a battery normally inside so some of them is in the end and some of them in this in this particular one so the panic bar the battery is in the front so I can open this part and we show you how to replace the battery very easy all right open opening this one yes four screw one here one in the ears are already took it off one down the bottom should be one here so we take this this part off and we're gonna see the inside all right I took the part off so as you see we have a battery here and this is our speaker today is working and you push it is gonna make the connection for the battery to showing the door is open and a