Compatible with the Red Karaoke mobile application to sing and record your performance: choose your favorite song among 70,000 karaoke titles!The first wireless mic with Bluetooth speaker integrated to sing and dance like a real star!Works wirelessly with every Bluetooth®-equipped device (10m).Mic volume control with echo control for nice voice effects.Transform your voice for hours of fun!Press the music control knob to choose between 3 tunes: a child voice, a high-pitched feminine voice, a deep-pitched masculine voice.Micro SD/TF card slot.3W speaker for a high quality sound and built-in rechargeable battery for around 3 hours music play time.Music control knob (play/pause, previous/next, volume up/down, voice changer function.