Fitian Power Adapter for Microsoft Surface Pro3/Pro4 Docking Station with AC Power Cable (US Plug) Fit for Microsoft surface pro 3/pro4 docking station ONLY; Note: Connector size is 3.5x1.35mm, smaller than the Microsoft connector size, please compare the connector size before add to cart Overcharge protection and electromagnetic immunity prevent overload and short circuit,over temperature; ABS fire-proof adapter housing material is more reliable and secure; Lighter weight, a convenient backup charger for travel and business. Certified by CE and FCC, high quality make you feel safe and secure; Package include: 1x power adapter, 1x AC power cable.