The pins on New Zealand power plugs look something like this:

New Zealand electrical plug

The image below of the power outlet shows the top switch is ‘Off’ and the bottom is ‘On’. Notice how the switch is down which means it is ‘On’.  In US this is the opposite. Note that not all New Zealand power outlet switches have a red mark on them. The red mark indicates the power is on. The outlets have switches on them so you can leave the piece of equipment plugged in but switch off the surge of electricity.

New Zealand electrical plug socket

New Zealand power plug adapters
If you are planning to come to New Zealand and you intend on bringing your own appliances such as a shaver or hairdryer, it is advised you purchase a Universal 3 flat pin power plug adapter prior to coming. If you do decide to purchase one then make sure to select one that has the earth pin. New Zealand power plug adapters look something like this:

New Zealand travel power plug adapter