In most places, it's unlikely that you'll need a plug adapter; almost all power points accept pretty much every common plug type aside from the obnoxious UK ones.

Voltage is 220V, but most things you're likely to bring with you (mobile phone, laptop, camera chargers, etc.) are almost guaranteed to support 100-240V these days. If it has a power brick/AC adapter of some sort, it's almost certainly universal, but it never hurts to read the fine print on the plug to be sure.