This 12-volt AC power adapter is a replacement part for use with the Spectra S1 Plus, Spectra S2 Plus, and the Spectra 9 Plus. It is compatible with US outlets. This plug has detachable prongs. If you are going to another country our S1 Plus, S2 Plus, and 9 Plus are international compatible at 100-240 voltage and 50/60Hz, so you would only need the plug converter for the country you are going to as it is international compatible. The output for the S2, S1, and 9 Plus is 12V, 2A. Important Note: This power adapter is only compatible with breast pumps that have a manufacturing date of 02/2015 and onward. If you are not sure whether this adapter will be suitable for you or you would like us to double check, please reach out to Spectra Baby USA. Includes: (1) 12 volt AC power adapter cord Owned and operated by fellow moms, lactation consultants and registered nurses, Spectra is committed to supporting every mother on the beautiful journey of breastfeeding. From our unique Natural Nursing Technology to our one-of-a-kind customer care, you can count on Spectra to be right there with you, every step of the way. We are moms. We are nurses. We understand.