This lightweight universal AC/DC Adapter is supplied with 12 different DC plugs for compatibility with a multitude of laptops. Output voltage can be adjusted by selecting the appropriate adapter tip for your computer. Compatibility List The notebook power adapter is supplied with 11 different tips which are numbered for identification. Use the adapter tip key and compatibility list to help identify which tip is required for your notebook. Important: Please ensure the power supply voltage rating for your computer corresponds to the tip voltage shown in the list below before you purchase this product. Not all laptop computers use the same voltage and you must check that the voltage rating is correct for your laptop before use.