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WhadUSay? 2-WAY SYSTEM System
The purpose of WhadUSay? Talk Back is to allow the rear passengers to hear the driver speak. The driver is facing forwards, away from the passengers, and so it is hard for his voice to be heard.
Apart from the convenience of being heard by the rear passengers this system is also an aid to safety as the driver does not need to shout or to turn his head to speak. The driver taking their eyes off the road for just a few seconds can result in a fatal accident.