The NZXT Relay Headset will work with any device with a standard 3.5 mm, CTIA compatible audio jack.  If your device features a 3.5 mm audio jack, simply plug the Relay in and you're good to go.

If you are using a device without a 3.5 mm audio jack, you may be able to connect the headset using the included USB Adapter either directly (via Type-A) or using an adapter/OTG cable.  USB compatibility may vary from device to device.

Are any features of the Relay Headset exclusive to Microsoft Windows?

The only features of the Relay Headset that are exclusive to Microsoft Windows are those tied to the NZXT CAM software:

• Microphone Volume
• Sidetone Volume
• DTS Headphone:X Support