You don’t necessarily need an additional mic to record into one because most of them come with built-in mics.
On top of that, digital recorders offer a lot more settings and options for creating audio because that’s what they’re literally built for. You don’t necessarily need an additional mic to record into one because most of them come with built-in mics. Additional benefits include built-in SD card slots and multiple input(s). The SD cards can be handy when you want to quickly drop some audio files over to your desktop and can’t be bothered to relocate and plug in all your equipment.