Here is a similar topic, though it recommends Zoom devices 
I found my current, old Tascam-DR-05 too noisy and also it lacks of audio device support / direct mic support. My impression is that Tascam firmwares seem to be kind of “oldschool”, but I can’t really give a good judgement. It powers on to ready-to-go-state within 2 seconds + 3 seconds holding down power button. Could be worse in newer versions. Your Zoom display looks very like my Tascam, maybe its one and the same firmware vendor?