There is a power diferance between Singapore and the US. I doubt that the US products would work. When I visited there 4 years ago I was told not to buy the local electronics because they would not work in the US. My suggestion is to purchase locally for the service.
Enjoy your time in Singapore. It is one of my favorite Asian countries. Stop in at Raffels for the curry.
Enjoy your time in Singapore. It is one of my favorite Asian countries. Stop in at Raffels for the curry.