This is a fire alarm sim. Click on the Fire alarm switch or click on the smoke detector to activate the alarm in a particular zone. Use the right arrow key to switch zones. There are 8 Zones. Press the RESET button to shut off all the alarms and press S to toggle the alarm between silence and non-silence. The TEST button can be used to test the alarm, and it will automatically shut off all alarms after 1 minute.
Credit: @-Rex- for PTE I do not know who the alarm came from, so please let me know if you know who it came from.