Briton - 539 ADD-Alarm Vertical bolt add-alarm is a self contained unit, battery operated local alarm
When fitted to a vertical bolt an audible alarm is
sounded if the cross bar is depressed or an attempt is made to remove the alarm cover
Once the alarm is initiated only the key holder can switch it off
The battery is long life high power (PP3 9v) and a
testing procedure is provided with a low battery
indiction giving an audible alarm every 30 seconds |
