Maymom AC adapter for Medela's Pump In Style Advanced, Traveler, or Companion; Medela Power Transformer Part # 9207010, 9V Model; Safe, Light, Compact & Efficient
Please look at your original Medela AC adapter or faceplate first to see if it says "9V" or "9VDC". If so, this adapter will work. If it says 12V, this adapter will not give it enough power.  A 9V adapter will likely slow your 12V pump.  If you have a Pump In Style pump that says "12V" on the faceplate or on its adapter, you need to order a different adapter. (Search for ASIN B008W8429W) This 9V adapter is 100% compatible with your 9V Medela Pump in Style pumps, or your money back! It is a replacement part for Medela Article # 9207010. If you are to travel to overseas, purchase a plug change (e.g. ASIN B000YN01X4).  You can use this adapter world-wide with appropriate plugs.