1.It indicates that the system work regularly if the indicator lamp is on.
2.Ten level simulate alarms system show the circumtance from far to near.
3.Display digital distance of battier.
4.Warmly remind stop.
5.Clew the orientation of barrier behind car.
6.Set buzzer to inside, three level regulating switch of sound individuality.
7.Set eight sepcial supersonic sensors, detect all direction.
8.Offer voice choice.
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