Here is a Bluetooth microphone that also has a speaker for your karaoke sessions. The G2 Bluetooth Karaoke Microphone has a powerful amplifier and dual speakers for a louder sound and better bass. It has a custom DSP chip to improve your voice. You get 8 sound effects to choose from.
This karaoke microphone also has a duet mode, so you can pair it with another microphone to sing with others. With G2, you can sing via Spotify, Smule, and other music apps. It is compatible with your favorite iOS and Android devices.[where to get it]