T POWER (9VDC) Ac Dc Adapter Charger Compatible with Medela Power Adapter Transformer Compatible with Pump In Style Advanced,Metro, Original,Traveler Breast Pump Power Supply T-Power (TM) Made with the highest quality / Input Voltage Range: AC 100V - 240V ( 8v~10v Compatible ) 9vdc Pump In Style Model: (All models) 57000, 57010, 57014, 57020, 57024, 57040, 57092, Advanced: - 57027 (shoulder bag) - 57036 (Metro) - 57062 (backpack) Compatibility: P/N: PART NUMBER : 9207010 (old) 9207056 (old) 68030 (new) 9207023 9207016 207024 (old) 9207042 (new) /upc: 20451970103 20451970661 20451970233 20451970165 20451970240 Note ! This AC adapter will fit all models of the Pump In Style or Pump In Style Advanced EXCEPT models of the Pump In Style Advanced made between 2003 and 2007.Look at the front of your breastpump (the faceplate). Find the place where you plug the power cord into the breastpump. Immediately underneath or beside that, look for tiny writing that says "Use Medela Trans. #920.7010." Or, look for the product number 920.7010 on the back of the power cord that came with your breastpump.