What frequencies can I use for my 5 GHz Wi-Fi device?

In New Zealand, Wi-Fi licensing allows for any person to operate devices in certain parts of the 5 GHz spectrum. The channels in green below are allowed to be
used in New Zealand. Any red channel is not permitted. If your device has a “NZ” regulatory button in its set up mode, using this setting will ensure the device
operates on the correct frequencies. Selecting any other regulatory regime may cause the device to operate outside of the New Zealand licencing rules and make
you liable for compliance action by the Radio Spectrum Management team at MBIE.

This diagram sets out the Wi-Fi channels that you can and can’t use in New Zealand. Full details of the licence regime for Wi-Fi use in New Zealand can be found
at www.rsm.govt.nz

Reference : https://www.rsm.govt.nz/consumers/pdf-and-documents-library/Wi-Fi%20Devices%20using%20the%205%20GHz%20Band.pdf