STIs newly redesigned Exit Stopper Door Alarm effectively helps solve the problems of unauthorized exits and entries of fire or emergency doors and helps prevent theft. Easy to install, the alarm flashes and gives an audible warning when activated (duration options include 30-seconds, three minutes or continuously). Warn in two languages with warning labels (includes 20 language labels). Updates include alarm and on/off symbols, flash/beep when turning on and off and a low battery warning (battery included).