Built-in battery with up to 4 hours of unplugged operation

Buy at www.musicianscart.com NUX AC-25 25-watt 1 x 6.5-inch Built-in Battery and Bluetooth Acoustic Guitar Combo Amp,25W combo amp with 2 channels optimized for acoustic guitar and mic input,NUX Stageman and LBox preamp models deliver responsive and transparent tone,6.5-inch speaker for pure rich acoustic sound,Built-in battery with up to 4 hours of unplugged operation,Drum machine to access rhythm tracks while playing,Reverb to help you sculpt your voice or guitar,Use the app for even more nuanced control,Connect your device via Bluetooth or Aux input to play backing tracks or pre-recorded accompaniment