The robust power supply and generous output design incorporate advanced low-distortion transistor circuitry for its time. The AU-888's unique appeal lies in its ability to faithfully reproduce music's warmth through rich mid-to-low frequencies and smooth high-frequency expression. [Appearance] Minor scratches and scuff marks are visible on the main unit and top panel. Discoloration and oxidation marks due to aging are present on the gold-plated areas of the rear panel (around labels and metal surfaces). There are no signs of rough handling, and it maintains a solid, dignified overall appearance. The wooden side panels, in particular, exude the classic aura of a “proper amplifier.” Please refer to the photos for detailed condition. [Functionality] Power: Normal Audio Output: Confirmed working on Speaker A and AUX (LINE IN) Lamps: All lamps light normally Buttons: Normal Important Notes: A crackling sound is audible when switching speakers, but no issues were found with other volume operations. Functions and input terminals not listed above are unconfirmed and not covered by warranty. [Included Accessories] All items shown in the photos are included. [Shipping] This item will be carefully packed with protective materials and shipped via international courier service such as FedEx. A tracking number will be provided after dispatch. Delivery times vary depending on destination. Please note that import duties, taxes, and customs fees are the responsibility of the buyer and differ by country.