Any flashing light can be called a blinker, but it usually refers to the turn signal on a car. Before you suddenly turn left, be sure to put your blinker on. A light that blinks on and off is a blinker, and it may be used to signal your plans to change direction in a car, or to send some kind of signal. Direction indicator lights or turn signals, informally known as directional signals, directionals, blinkers, or indicators, are blinking lights mounted near the left and right front and rear corners of a vehicle, and sometimes on the sides or on the side mirrors of a vehicle (where they are called repeaters). Turn signals are required to blink on and off, or "flash", at a steady rate of between 60 and 120 blinks per minute (1–2 Hz).