This Korg SDD-1000 Digital Delay is known as one of the best digital delays ever made. It also has a great modulation / chorus effect. In fact there are musicians who use the SDD-1000 just for the chorus. It's also a sequencer / sampler. I tested the unit for delay and modualtion. They both work great and sound fantastic. I know nothing about sequencing so I couldn't really test it. The case has gotten some dings and scratches in it's 30+ year life. The Korg SDD-1000 is known for being very durable and dependable.I'm selling the delay as is with no warranty. I ship to the lower 48 states only. No P.O Boxes or APOs.Thanks for looking and my Korg SDD-1000 Digital Delay.