AirPlay
When working in AirPlay mode, the M15S requires a valid WiFi connection.
Please confirm that it is connected to an available network before entering
AirPlay mode.
There are mainly 3 steps.
1. Make sure the M15S and your iOS devices are connected to the same WiFi
network.
2.Switch the M15S to the AirPlay mode.
3.On the drop-down menu of the iOS device, choose the M15S as the playing
device. So the M15S can receive audio signals from the iOS device.