Multi-function design incorporates a wireless microphone with Bluetooth speaker that connects to your smartphone, tablet, or computer. Microphone can be used independently, and has 5 built-in filters for high pitch, bass, volume, reverb, and accompaniment. Works with all karaoke apps, and is compatible with Android and Apple operating systems. High-capacity battery lets you enjoy up to 5 hours of portable, wireless entertainment. Bluetooth Stereo Speaker.