This is an analog delay pedal said to be in the BOSS MD-2 family. It has a sound that blends well and doesn't get in the way even when left on. It's a great deal as it also has modulation. ~Quoted from the product description~ The Mlekko Heavy Industry EKKO 616 Dark is an analog delay pedal featuring a wide, sweet, and dark reverb, and a very rich delay sound with heavy overtones. The EKKO 616 Dark is an analog delay with a maximum delay time of 650ms, equipped with modulation control, a buffer switch, and an internal level pot. While packed with all these features, it maintains a compact size. The highest quality components were further hand-selected, resulting in Malekko's darkest delay sound yet. The EKKO 616 Dark is based on the EKKO 616MKII, but the low-pass filter frequency is set to around 400Hz, rolling off the high-frequency range. This allows a dark tone to overlay the background of the guitar sound, especially when the feedback is set high, providing a heavy tone without interfering with the guitar tone. If you set the feedback low and the delay time short, and set the mix well, you can get a very fat muted sound. Pressing the Modulation button, the EKKO 616 Dark begins to show new possibilities. You can get various modulation sounds, from chorus to beautiful vibrato. Furthermore, the EKKO 616 Dark allows you to select between true bypass and buffered bypass. The buffer circuit of the EKKO 616 Dark has a smooth and transparent tone, and can suppress the attenuation of the tone even when using many effectors simultaneously. ~End of quote~ There is some slight wear and tear, but I think it's in good condition with no major scratches. Please check the photos. The original box is included. Operation has been confirmed. Due to work, shipping will basically be on weekends. I am also listing on other flea market sites. Please forgive me if the item is out of stock. Thank you.