GOOQ New 12V DC Power Supply Charger Adapter Cable for Microsoft Surface RT Surface Pro/Pro 2 (Surface RT Charger Cable) Fit for Microsoft Surface RT & Microsoft Surface Pro/Pro 2 100% Brand new and high quality. Note: please make sure this cable just work for surface Rt surface pro/pro2, not for surface pro 3 before you are buying. The size of the barrel connector is 5.5mm*2.5mm Allow to connect external power bank with DC 12V/2A output for Microsoft