This item is being sold as junk because it does not power on. It is unknown whether the issue is with the unit itself or the AC adapter. The HD5DA is a 1-input, 4-output HD-SDI distribution amplifier/repeater. Since I have multiple units, the serial number on the unit may differ. Manufacturer's website: https://www.aja-jp.com/products/mini-converters/12-hd-sd/21-hd5da Key Features: Compact and easy to carry There are minor scratches from use, but there are no issues with the quality. Shipping: The item will be carefully packaged and shipped promptly. Tracking number provided for peace of mind. Please feel free to contact me with any questions or concerns before purchasing. Thank you for your understanding and cooperation.