The power adapter is an invaluable tool for a laptop to get power supply safely. Hence， if the original adapter for your laptop is broken or malfunctioned， you should immediately get a new one to power on your computer and this power adapter would be the best replacement. With latest technology， this adapter is specially designed with built-in protection to protect your computer against unexpected power surge damages. Besides， it also features stable voltage and noise reduction. Overall， this power adapter is of high efficiency and reliability                                    Features             Low interference !#!amp!*! noise<br> Advanced technology and high quality<br> High efficiency and reliability<br> Short circuit and over voltage protection<br> A durable and well-made Laptop Power Adapter guarantees long term use <br>                                                            Specifications             Input    AC 100-240V，1 A，50-60 Hz    <br> Output    19 V，2.37 A    <br> Interface Dimensions     3.0* 1.1 mm    <br> Compatible with     ASUS Zenbook UX21 UX21E UX31 UX31E    <br> Color     Black    <br> Weight     7.48 oz / 212 g    <br> Power Cable Standard     US Standard    <br> Power     45W     <br>                                                             Package Includes            1 x Laptop AC Adapter for Asus Zenbook UX21 UX21E UX31 UX31E 1 x power Cord                                                            Extra Info            Fit Laptop ModelsAsus Zenbook UX21 Series<br>Asus Zenbook UX21E Series<br>Asus Zenbook UX31 Series<br>Asus Zenbook UX31E SeriesSamsung Series 9 NotebookNP900X1A，NP900X1A-A01US，NP900X1A-A01，NP900X1AA01US<br>NP900X1B，NP900X1B-A01US，NP900X1B-A01，NP900X1BA01US<br>NP900X1B，NP900X1B-A02US，NP900X1B-A02，NP900X1BA02US<br>NP900X3A，NP900X3A-A02US，NP900X3A-A02，NP900X3AA02US<br>NP900X3A，NP900X3A-A03US，NP900X3A-A03，NP900X3AA03US<br>NP900X3A，NP900X3A-A05US，NP900X3A-A05，NP900X3AA05US<br>NP900X3A，NP900X3A-B01US，NP900X3A-B01，NP900X3AB01US<br>NP900X3A，NP900X3A-B02US，NP900X3A-B02，NP900X3AB02US<br>NP900X1B，NP900X1B-A01SE，NP900X1B-A01，NP900X1BA01SENP900X1B，NP900X1B-A01AU，NP900X1B-A01，NP900X1BA01AU<br>NP900X1B，NP900X1B-A01UK，NP900X1B-A01，NP900X1BA01UK<br>Samsung Series 5 Chromeboo NotebookXE500C21，XE500C21-A01US，XE500C21A01US<br>XE500C21，XE500C21-A03US，XE500C21A03US<br>XE500C21，XE500C21-A04US，XE500C21A04US<br>XE500C21，XE500C21-H01US，XE500C21H01US<br>XE500C21，XE500C21-H02US，XE500C21H02US<br>XE500C21，XE500C21-H04US，XE500C21H04USSamsung Series 3Samsung Series 3 305U1A-A01<br>Samsung Series 3 305U1A-A02<br>Samsung Series 3 305U1A-A03<br>Samsung Series 3 305U1A-A04<br>Samsung Series 3 305U1A-A05<br>Samsung Series 3 NP305U1A<br>Samsung Series 3 NP305U1A-A01US<br>Samsung Series 3 NP305U1A-A02US<br>Samsung Series 3 NP350U2A<br>Samsung Series 3 NP350U2A-W01UB