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.;Multimedia Speaker : A 3W Powerful stereo speaker that emits truly unbelievable sound with clarity. Can be easily used as a speakerphone for taking calls.Junior can entertain you in many ways - via Bluetooth, FM Radio,USB Pen Drive , Micro SD Card and AUX-IN options allow you to stream music from your smartphones, laptops and with AUX cable from your PC or MP3 player With 300mAh built-in rechargeable battery, you can play non-stop for up to 3 hours (medium volume) on a single recharge.