I’ve just bought a new Medela Sonata which is a US model and hospital grade, so will need a travel adaptor to work. I used one for my last baby and I still have it. I recently tried and it didn’t work so I thought my old one was spoilt so I bought a new one. But turned out it’s just that my travel adaptor was spoilt and my old pump still works. Am happy to let go at a cheaper price of S$500! I bought at S$580, price negotiable.