When listening to music on iPhone 7 while charging, it can only be played through external amplifiers and Bluetooth headsets. Because the wired headphones match the charging port of the iPhone 7, they cannot be used.
How to use Bluetooth function on iPhone 7 to listen to music while charging:
1. Click on desktop settings;
2. In the settings list, please click "Bluetooth" column;
3. Next, please prepare the Bluetooth headset for connecting to the iPhone. Generally, Bluetooth headsets will have a power switch;
4. When Bluetooth After the headset enters pairing mode, you will see it under "Other Devices" under the iPhone's Bluetooth list;
5. When the connection is successful, you will see the "Connected" status. Once you get down, you can charge your iPhone7 while listening to music.