Features . Designed to meet thestandards of the original manufacturers specifications.Energy saving chip and technology integrated in to the adaptor.Built with protection for Over Voltage Over Current Over Temperature over power and short circuit.Auto voltage selection voltage is set by the interchangeable tip.Supplied with 9 interchangeable tips for increased compatibility. 90W Universal AC Adapter90W 19V 4.74A Universal AC Adapter with 8tips used for many brands of Laptops Ultrabooks and Mini laptopsPlug E (Black) . DC Plug Outer - 4.5mm Diameter Inner - 3.0mmCompatible with HP Smarttouch Envy 14-17 Pavillion15 Ultrabooks . Plug T (Black) . DC Plug Outer - 4.8mm Diameter Inner - 1.7mmCompatible with Asus HPCompaq Gateway LG and; eMachines LaptopsCompatible with HP HP Folio 13 Envy 4 6 Sleekbook PC Ultrabooks . Plug B (Pink) . DC Plug Outer - 5.5mm Diameter Inner - 1.7mmCompatible with Acer Packard Bell eMachines and; Gateway LaptopsCompatible with Acer UltrabooksCompatible with Acer Dell and; Packard Bell Netbooks . Plug L (Blue) . DC Plug Outer - 5.5mm Diameter Inner - 2.5mmCompatible with Acer HP Compaq Asus Toshiba IBM Lenovo LG Fujitsu BenQ LaptopsCompatible with Toshiba Fujitsu MSI and; Lenovo UltrabooksCompatible with Toshiba Lenovo MSI Advent BenQ and;LG Netbooks . Plug D (White) . DC Plug Outer - 5.5mm Diameter Inner - 3.0mmCompatible with Samsung LaptopsCompatible with Samsung Netbooks . Plug H (Black) . DC Plug Outer - 7.4mm Diameter Inner - 5.0mmCompatible with HP Compaq LaptopsCompatible with HP Ultrabooks . Plug G (Grey) . DC Plug Outer - 8.0mm Diameter Inner - 5.5mmCompatible with Lenovo IBM Laptops . Plug U (Yellow) . DC Plug Outer/Diameter Inner - SquareCompatible with Lenovo IdeaPad Thinkpad LaptopsCompatible with Lenovo IdeaPad Thinkpad Ultrabooks.