Time Measurement System for Sprinters
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Self mode
You can measure your time even if you are training by yourself.

The "on your mark, set, Bang" button automatically generates three sounds; "booooo (on your mark)", about 15 seconds, "boo (set)", about 1.5 seconds, and then "Bang". The time between "boo (set)" and "Bang" randomly changes around 1.5 seconds. So, you cannot guess the start timing.

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