Notice Output : 9V 1A/1000mA Max Connecter Size :5.5mm x 2.1mm ,Wire Length:Approx. 4.9ft / 150cm How to use it? -Get it and plug it to the socket. IMPORTANT NOTE: In order to get the right adapters, please check the device before your purchase: 1) The size of DC jack needed for the device? →To get this information from device's specification or measure the size of the DC input by a ruler 2) The level of voltage and rate current needed for the device? →To get this information from device's specification or the rating label from original adapter)