The NUX AC-25 is a small acoustic amplifier with built-in rechargeable battery that can run 4 hrs for busking. It has a 6.5" speaker, Modeling Preamps, Reverb, Bluetooth Audio Stream, Drum Machine. You can tweak it through Stageman APP on the mobile phone. Two channels: It means you can plug a dynamic mic and your acoustic guitar. You can play playbacks via Bluetooth Audio Stream, or auxiliary input.

Wattage: 25W
Controls: 2x Volume, Bass, Middle, Treble, Send, Reverb, Master
Specifications: Compact acoustic amplifier with built-in rechargeable battery
Specifications II: Battery power for 4 hours outdoor performing
Specifications III: Effects: Reverb
Accessories: Power supply
Width: 280mm
Height: 220 mm
Depth: 218mm
Weight: 5 kg