Samsung 19V 2.1A 40W Replacement AC Adapter for Samsung Notebook Model: Samsung NP305U1A, Samsung NP305U1A-A01US, Samsung NP305U1A-A02US, Samsung NP350U2A, Samsung NP350U2A-W01UB, 100% Compatible With P/N: AD-4019W, AD-4019P, AA-PA2N40L, BA44-00278A. ***COME WITH MICROFIBER ADAPTER POUCH!! "STONE POWER EXCLUSIVE"***