Traffic Light Laser Monitor

监控交通灯颜色并找出它变绿的时间。

This Traffic Light Laser Monitor can be used to monitor the traffic light color and find out when it turns green.

You can use this app on most traffic lights because traffic lights with 3 lights, 2 lights or 1 light are supported.

Usage

1) Position the circles on the traffic light and press the button.

2) Wait for the traffic light color to change. Position the circles farther on the traffic light.

3) Thats it! When the traffic light turns green, the app tells you this.