LONG PLAY TIME : In-Built Rechargeable battery with 10 Hours+ play time. Rechargeable Battery fully recharges in 3-4 Hours. Charging Cable Provided ( Use any Standard USB Charger).;SOUND MIXER : Bass, Treble & Echo Controls help you sound like the professional playback singers. You can set your own level of frequencies Bass Treble Mids or even the total Volume.;KARAOKE AMPLIFIER : Connect the Karaoke Mixer Line Out to with the Input any Sound Amplifier or Home Theatres - Professional Karaoke Microphone Included. All Frequency Levels can be adjusted from the Control Panel of the Sing Along Karaoke Mixer.;VERSATILE : Also can be used as an audio mixer to connect your instruments like Guitars & keyboards as it comes with a 6.5mm Input & even to your home speakers.