Sockets in Bali / Indonesia
Type CType F
Your the US plugs don't fit the sockets used in Bali / Indonesia.
Bali and the rest of Indonesia use the European round-pin Type C/F sockets, so your US flat plug won't fit and you'll need an adapter. The voltage is 230V against the US 120V, so watch anything single-voltage.
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Yes, Type C/F sockets don't take US flat plugs.
Only dual-voltage; single-voltage 120V appliances risk damage on 230V.
Types C and F, at 230V / 50Hz.