A 3-pin flasher with a buzzer is an essential automotive component used in turn signal systems. This device features three pins that connect to the vehicle's wiring: one for power, one linked to the turn signal switch, and the third for the output to the turn signal lights. When the turn signal is activated, the flasher interrupts the circuit rhythmically, causing the lights to flash. The integrated buzzer adds an audible element to the signaling, providing both visual and sound indications. This combined functionality ensures effective communication of the driver's intention to turn, contributing to road safety by enhancing awareness among other road users.