Forgetting the headlights or the radio on makes it difficult or even impossible to start the car, as it consumes battery on a stationary position. ELO Warning Buzzer is designed to warn the driver for such instances. The buzzer may be used for variety of applications such as to warn the driver that the car is in reverse gear, hand brake is engaged, the headlights are on, the seatbelt is not fastened, and many more.