| 摘要 |
A device is disclosed for providing drivers of road vehicles with additional audible indication that the turn signal system has been selected "on" and is still operating. The "flasher" device in said road vehicles is supplemented with an electronic tone-producing device connected at its accessible power terminals such that the electronic tone is audible to the driver, emitting a series of short duration tones, preceded and preferably separated by significant time delays, occurring from the initiation until the cancellation of the turn signal.
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