Rolls RM69 MixMate 3 Mic/Source Mixer, Black

Is it capable of audio ducking? Does it turn down the music when you speak into a microphone?

Does this unit not have a fuse or circuit breaker?

Is this only good for 110-voltage?

Anyone care to review or comment on the quality of the mic preamps for the two mic inputs here? Notes only say individually switchable phantom power.