Auto Buzz is FreshBuzzer's most powerful feature. Not because it is complicated, but because it isn't.
Auto Buzz simply buzzes in anyone who rings your buzzer - always! Just like that guy on the third floor who never checks who is actually ringing even when he doesn't expect anyone.
With great power comes great responsibility. Use this feature carefully as it does decrease security.
A great alternative to Auto Buzz is
Party Mode, which is similar but automatically turns off after a preset amount of time - great for dinner parties or other occasions where you expect a lot of guests in a short time.