With these karaoke microphones, you can sing along to your favorite music. You can easily connect them to a speaker both wired and wirelessly. That way, you can hear your voice through the speaker and sing along to the music. When you want to sing with friends, get a duo pack. Most microphones have cardioid directional characteristics. This means that the microphone records sound from 1 side. The microphone then only picks up your singing and not the background noises.