Multi-functional effects unit for acoustic guitars, equipped with a variety of effects such as reverb and delay. - Model Name: AC-3 - Brand: ZOOM - Input Type: Acoustic Guitar - Output Type: Effects Processor - Functions: Reverb, Delay, Chorus, Compressor - Adjustable Parameters: Volume, Tone, Mix, Time, Rate, Depth - Number of Effects: Multiple Effects - Tuner Function: Built-in Tuner - Boost Function: Adjustable Boost Level Thank you for viewing. Although there are no images, the original box etc. are available. Thank you.