The drainage function can be used when the watch is finished swimming or when the speaker is filled with water in daily life. The principle of the drainage function is to make the speaker vibrate by playing sound of a specific frequency. The vibration is used to drain the water that has invaded the speaker and protect the speaker from being eroded by water. Method 1: Swipe up the watch's main dial page to open the control panel, and tap the drain icon in the control panel; Method 2: After swimming, it will automatically enter the drainage process.