4-IN-1 KARAOKE BLUETOOTH MICROPHONE: This portable wireless microphones karaoke can be used as microphone, Bluetooth speaker, loudspeaker and recorder. Using this home karaoke machine singing or record your wonderful voice at any time/where. QUALITY AUDIO SOUND: Equipped with professional audio processor and tuning system, three layers pop filter, creating a stunning KTV live-sound environment and wonderful echo reverberation. It's also a microphone speaker with magic voice chaning: children's voice, female voice, male voice, old male voice. So fun LONG USING TIME: Long lasting and playing time up to 8 hours after full charged. This is a brilliant Bluetooth microphone for kids, parties, family evenings and special occasions.