vernice,
yah need to get adapter. I went to first few years to buy the original medela PIS adapter cos mine is a USA set, "PIS original". I just bought it recently. You need o check whether yours is the 9w or 12w one cos the adapters are different, and last I was there they were out of stocks for one of them. Cannot rem which one. $85 for one.
In hindsight I should have bought from ebay USA retailer or from the spree. Buy the UK version. I blur lah. Actually I suspected that I can use the UK version also, so emailed the ebay USA medela retailer but that fella blur sotong, told me singapore cannot use so I kiasi, decided to buy from the first few years instead. Ebay one only about $30plus $40 even with delivery charges. Recently went to visit a friend, only to realised that she bought the UK version from probably rhe same Ebay USA medela retailer and have no problems using it.
There is also a spree going on it you want to join.