Handheld Karaoke Allinone System with Bluetooth and MP3 Playback. Bring karaoke on the go with Naxa’s Handheld Karaoke AllinOne System (NMK103). This handheld karaoke system comes with a sleek, sturdy protective case that is easily portable and lessens hassle to pack for travel. Allinclusive features fit into just one microphone, simply connect to an external media device via Bluetooth. Customize your sound with the various control features, including reverb, treble, bass, mic volume, and master volume. The builtin stereo speakers provides optimal resonance and peerless sound quality.Portable allinone karaoke microphone with builtin stereo speakers. Connect your Bluetooth enabled smartphone to sing along.Supports MP3 playback from USB flash drives.3.5 m AUX input (with included adapter)Reverb, treble, bass, mic volume, and master volume controls. Power: Rechargeable battery (2000 mAh)Accessories included: Protective case, USB cable, AUX adapter.