A Patent Pending Microsoft PRO 3 compatible docking unit from eTauro. Officially named "DUC" that stands for DisplayPort, USB3 and Charger. A highly engineered and very portable alternative to your Microsoft dock. Weighing at only 3 oz, it fits perfectly on your PRO 3 for an integrated look. Featuring "Sign of Life" to give early visual indication your PRO 3 is ON instead of waiting for the screen to boot up. When powering down the PRO 3, hold down the power button until the "Sign of Life" is OFF. The side mounted design does not restrict PRO 3 viewing angle. It also features "Bus power" mode where no external power is needed for the DP and the USB3.0 to work. When AC adapter is plugged in, the DUC will charge the PRO 3 and supply plenty of power to all attached USB3 devices. The unique design of eTauro DUC has a standard 2.1mm barrel DC connection to take power from any 60W+ laptop AC adapter with 12V to 16V DC output. Many of us have this sort of AC adapter at home. Or use it with our power pack, a 60W supply, you can charge your PRO 3 from any standard electrical outlet. Make sure you add the power pack plus or power pack II into your shopping cart before checking out if you do not have a compatible AC adapter. Power pack plus includes an AC adapter and a heavy duty car charging cable. Power Pack II is our new travel sized power supply. Leave your Microsoft dock at home but take the "DUC" out. Guarantee to work and fit your PRO 3 or return for exchange within 30 days. Please ask us or write to us on how to save SSD capacity on your PRO 3 as well as how to configure dual monitor set up using DisplayPort and DisplayLink technologies. FREE TECHNICAL SUPPORT for your PRO 3 issues to make sure you are 100% satisfied with your purchase. eTauro also produces DUCGe that adds a gigabit ethernet port.