13. What is the function of the M15S' In-vehicle mode? And how to use it?

【Principle】After turning on the In-vehicle mode, you can connect the M15S to the on-board USB port, and the M15S will power on automatically and switch to the In-vehicle mode screen when the vehicle engine starts, and power off automatically when the vehicle engine stops.

【How to set】Go to Settings->Global->In-vehicle mode, or the drop-down menu to turn on the in-vehicle mode.

(Some onboard USB ports may encounter interruptions when connecting to the M15S, in which case you can try to use FiiO's USB isolator, the LA-UA1, to fix the problem.)