Thank you for viewing. This is a Maxon AD-900 analog delay. As shown in the third photo, it's an early model with two BBD chips. [Product Overview] - Model Name: AD-900 (Early Model) - Type: Analog Delay - Control Knobs: 3 (Delay, Repeat, Level) - Power: DC 12V (center positive) [Storage] - Non-smoking environment, no pets [Condition] - Appearance: Please refer to the product images. Velcro is attached to the back. - Operation: As of November 2, 2025, the following operations were confirmed to be normal: Power: The switch turns ON/OFF without any problems. Sound Output: Although it's a layman's judgment, the effect worked without any issues. Scratchiness: During performance → Not audible; When operating knobs → Not audible. *Please note that the scratchiness check was not performed at high volume. [Items for Sale] - AD-900 main unit - AC adapter (non-genuine, but included if desired) *Please note that the cables etc. shown in the images are not included.