This 20V DC power adapter is primarily a replacement or spare power adapter for the DK30A2DH or DK30ADD laptop docking stations. It can also universally supply power for any electronic device that has an N-type barrel and requires 20 volts and up to 2 amps of power. Replace Your Failed or Lost Power Adapter The power supply is a perfect replacement for the lost or damaged 20V / 2A power adapter you've used to power your existing electronics such as your docking station. Keep a Spare Power Adapter on Hand When downtime isn't an option, keeping spare power adapters on hand ensures that you won't be left waiting for a replacement to arrive or have to replace your devices just for the sake of a compatible power source. The SVA20N2NEUA is backed by a StarTech.com 2-year warranty and free lifetime technical support.