[Ddshopping]1.2M 12V 2.5A Portable Replacement Adapter Magnetic Cable Cord Mobile Power Charging Cable for Microsoft Surface PRO/PRO2/RT/RT2 10.6 Inch Tablet (pro 2 charging cable) NOTE: ONLY for 12V 2.5A mobile power supply!!! No USB port or AC power supply! high speed charge, Tinned copper, Electromagnetic Immunity It is convenient to charge for your pro 2 tablet by mobile power supply Interface: 5.5mm(outer diameter)*2.1mm(inter diameter) DC charging cable for Microsoft Surface Pro 2 that is compatible with both of our powerbanks. Please note that you need to set voltage at 12V before charging your Surface Pro otherwise your device will not charge.