You can fix your hair and let you listen to music and talk while doing various other activities.
Built-in microphone, can be used to directly transfer the call to your audio device, hands-free listening.
Built-in rechargeable lithium-ion battery, charging through the USB cable, waiting for a long time.
When you exercise, you can absorb sweat.
When you sleep, you can use your eyes.
You can undo and wash.