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People who take metro usually be gripped by the rapid closed door. Because of the strong extrusion pressure, some bags were broken or even people get injured. The origin of that situation
is caused by misjudging of door’s closing time. This alert timer is designed to help people estimate
it accurately. The countdown number in the middle along with flicker LED light around can remind all kinds of people to pass in time. When the light begins to turn red, the LED screen shows number and countdown in seconds. Meanwhile, the alarm voice will remind you to hurry up. You have 9 seconds to prepare.
China Academy of Art