The Exit Stopper (STI-6400) is easy to install and helps prevent unauthorized use of emergency exits and fire doors. Alongside the audible warning alarm, models now have a flashing LED. The enhancement also includes updated text and universal sound symbols, and there’s an area for a second language (21 label options included), allowing the unit to be used globally. When a protected door is opened, it emits a 95/105 dB alarm and flashes. These new features come standard with all red Exit Stopper models.