There are two ways for Apple Watch to listen to music:
1, one is to connect to the iPhone, or connect to the computer through Wifi, and then use Apple Watch as the remote control to remotely play the music in the iPhone or computer iTunes software.
2. Another way is to sync the music from the iPhone to the Apple Watch, set it in the Apple Watch app of the mobile phone, open the music in my watch, and select the playlist on your iPhone from the synchronization list (none by default). When the Apple Watch is in the charging state, the synchronization process of iPhone music will be completed, and the concerts on the iPhone will be copied to the watch. In this way, even if your watch is not connected to your mobile phone, your watch can play music.
The way Apple Watch connects a Bluetooth headset (preferably a stereo Bluetooth headset) is also simple:
1. Enter the settings of Apple watch and select Bluetooth.
2. Turn the Bluetooth headset to the matching mode (generally, after the phone is turned off, press and hold the power button of the Bluetooth headset until it enters the matching mode. For details, please refer to the instruction manual of Bluetooth headset).
3. At this time, Apple watch can search for your Bluetooth headset and click Match.
4. When you use the Bluetooth headset again, it will prompt you to connect two devices (different headphones prompt in different ways).
5. Then you play music with Apple watch. Even if Bluetooth is turned off, you can still hear music in the Bluetooth headset.