2007-4-22 2006-4-11 The Medela American transformer (AC adapter) works in the U.S. and in countries using standard 110 Volts AC electrical outlets. Designed to power the Pump-In-Style Breastpumps. 195916 text/html 1.0 EN Medela Transformer-Standard St.9207010 Medela Transformer-Standard Medela American transformer (AC adapter) using standard 110 Volts AC electrical outlets used with the regular Pump In Style Pump In Style Companion Pump In Style Traveler Transformer-Standard St.9207010 text