Unlike Medela's original huge-and-large AC adapter, this one won't fell off from the outlet due to its weight. Nor will the cord connector damages itself due to heavy weight. Please look at your original Medela AC adapter or faceplate first to see if it says "12V" or "12VDC". If so, this adapter will work. If it says 9V, this adapter will not work. A 12V adapter will likely damage your 9V pump. We will not be responsible for the damage. If you have a Pump In Style pump that says "9V" on the faceplate or on its adapter, you need to order a different adapter. This 12V adapter is 100% compatible with your 12V Medela pump. It is a replacement part for Medela Article # 9207041.

• Light-weighted and compact size. Easy to carry while commuting and traveling. It is only 1/5 of Medela counterpart's weight.
• Energy efficient - this adapter will not become overheated.
• Input: 100-120V~50/60Hz; 0.3A.
• Output: 12VDC, 1A (or 1000mA) with over-loading protection to protect your pump.
• Dimension: 2.63 x 1.06 x1.77 inch ( 6.7 x2.7 x4.5 cm ) Weight: 3.6 oz (100g) Cord length: 6 feet (185 cm)
• Designed to replace Medela part #9207041

This product is made in Taiwan and is designed to fit Medela and Lactina breastpumps.