The JOYO BSK-60 Acoustic Guitar Amp provides a huge 60W of Power, a Rechargeable Lithium Battery - Reverb, Delay, Chorus Guitar FX - In-Built Looper for Guitar - Anti-Feedback - Footswitch Control - Dedicated Mic Channel - 9V 500mA Output for FX Pedals. BSK-60 amp is specially designed for acoustic guitar, with 60W(RMS) power. Its EQ curve is tailor made for acoustic guitar, with built-in anti-feedback function and guitar signal phase inverter function, offering a nice and bright treble with rich mid-low frequencies.