I don't have one of these but I do own a USB microphone that probably functions very similarly - it appears as a "Speaker" (and obviously, a microphone device), and if you plug headphones into the microphone itself, you'll hear the monitor audio and if you route your PC's audio through the "Speaker" the microphone will mix your audio output with the monitor output.

This is a long way of saying that the monitor latency is practically 0.

If your mic doesn't have a monitor, you can do this on PC itself by using something like Voicemeeter but you'll incur a small amount of latency and many people have a hard time talking when they hear themselves on a delay.