9.Stopwatch
9.1.Stopwatch mode
9.2.Stopwatch
9.3.Lap Time
9.4.Lap Time Record Query
9.5.Lap Time Record Delete
10.Timer
10.1. Setting Initial Countdown Time
10.2.Using Timer
11.Sleeping Mode
12.Button Locked/Unlocked
13.Turn on EL backlight
14.Water Resistance
15.Replacing Battery
16.Safety Information
17.Product Specification
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