The Narva 'Headlights On' Warning Buzzer lets you know when the vehicle doors are open, or the headlights left on. The 85dB rating means that you will hear the alarm, but it is not loyd enough to cause irritation.
Narva Warning Buzzer Specifications INPUT VOLTAGE RANGE: 12 or 24 Dual Voltage LEDs: 0 OTHER: 90 Decibels