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This is a design for the bicycle accessories, in order to strengthen security.
Before riding, open the switch, the ground will be project a safe distance pattern,
and it will continue lighting with led.
While riding,it will trigger electronic gyroscope flashing
when bicycle turning or changing driveway due to the angle more than 25 degrees,
in order to remind the rear by passers-by.
ZI MING LI,
ZHANG RU YU,
GUO JIN YU ,
TU YI RU,