1. First, check whether the wired earphone is plugged correctly and whether it can record. At the same time, you can click on the recording page to adjust the reading and listening volume of children.
2. Secondly, check whether the reading ear return switch of Tonglesi is turned on.
3. Finally, due to the large delay of Bluetooth ear return, it is recommended to turn off Tonglesi ear return when using Bluetooth headphones.