YAMAHA digital reverb R1000. I have confirmed that all four reverb modes are functioning correctly. The GAIN knob of the parametric EQ has a slight scratchiness, but there is no other scratchiness. This is a reverb-dedicated unit, and each control terminal has a single function. Because of this, there is no need to call up parameters and change them with buttons, allowing for direct adjustment even in the dark, and the quick response makes it highly operable. The current operation is not a problem, but as it is an old device, please understand that it is sold as-is, with no returns. ・Dimensions: 480W x 45H x 311D mm ・Weight: 4.8 kg ・Power consumption: 18W No accessories included. Thank you for viewing.