Product information "PERFECTA (Umarex) Shrill Alarm SA1"This three little key fobs produce a real loud alarm (120 - 130 dB), after the safety pin is removed (stops after putting pin into the fob again). Can be fixed to your children's key chain and attracts everybody's attention in case of emergency. Perfecta SA 2 with additional LED-lamp, Perfecta SA3 with an extra button for manual alarm.