PACKAGE CONTENT - Tip Adapter Connector Converter 5.5x2.1mm to 2.5x0.7mm 15cm DC Power Connect Specification - Type: DC Converter Cable ; Total Length: 15cm / 5.9' ; Converter INPUT: 5.5mm*2.1mm Female ; Converter OUTPUT: 2.5mm*0.7mm Male with pin Features: Tip Converter Adapter Cable for Converting 5.5 x 2.1mm Big Round Tip With Pin to The New 2.5x0.7mm Tip with Pin CONNECTOR - one side is 5.5x2.1mm female plug, another side is 3.0x1.1mm plug NOTED - Please make sure the Tip Connector size of the ac adapter are identical to what your need before buying.