FM reception in my area is not great, but barely functional with this unit. Bluetooth does not work. Audio ok, but mostly speaker dependent. Max power in is 60W so 30W per channel. Power switch only works for 110vac. When using 12vdc power unit is on all the time. I do not have a MP3 player, so not tested. There is no setting for MP3, only Bluetooth, FM, and Line.