Thank you for viewing. This amplifier has been tested and produces sound. This is a used item, so there may be scratches and stains. ○ Instant purchase OK! The person who purchases the item will be given priority, even if there are comments. ○ Anonymous delivery! We will ship via Rakuraku Mercari (Takkyubin), so tracking is available. When shipping, we will wrap the outside of the case with bubble wrap. ○ The number of days until shipment is 4-7 days, but we basically ship on the same day or the next day! (If you purchase on Friday through Sunday, it may be shipped on Monday) Thank you for your understanding.