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 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!*! noiseAdvanced technology and high qualityHigh efficiency and reliabilityShort circuit and over voltage protectionA durable and well-made Laptop Power Adapter guarantees long term use                                                            Specifications            Condition    New    <br>Input    100-240V ~ 1.0A， 50/60Hz    <br>Output    20v~2A 40W    <br>Tip Diameter    0.1 x 0.22 inch / 2.5 x 5.5 mm(Inner Dia. x Outside Dia.)    <br>Weight    5.75oz / 163g    <br>Color    Black    <br>Adapter Size    3.74 x 1.57 x 1.1 inch / 9.5 x 4 x 2.8cm(L x W x H)    <br>Adapter cable    Not included    <br>Package Size    7.4 x 5.0 x 1.81 inch / 18.8 x 12.7 x 4.6cm(L x W x H)    <br>                                                            Package Includes            1 x AC Adapter