NUX PA-2 Portable Acoustic Guitar Multi-Effects Pedal Processor Big LCD screen display,3 acoustic preamp: FLAT, JUMBO and MELLOW,3-band EQ, Modulation effects: chorus 1,chorus 2 ,Wide,delay,room reverb,hall reverb,and compressor. 18 presets (9 Factory 9 User),Built-in Tuner and metronome with selectable rhythm patterns TS/AC technology brings out the realistic acoustic guitar tone. AUX IN makes it easy to jam along with an external music-playback device (mp3 player, etc.)