SteelSeries products are ready to go out of the box, and do not need to be registered before use. Simply plug in the device or the device's transmitter, turn your device on, and start gaming! Please refer to your device's Product Information Guide for further guidance on how to setup your device.
If you are connecting your device to a PC for use with SteelSeries GG, please make sure the device is connected correctly! For assistance with connecting your device to Engine, please see this article here: USB product support for SSE
Device registration is also not required for warranty. Please retain any receipts from the purchase of your device, as it will be required for any claims you may need to make. More information can be found here: What does my warranty cover and how long does it last?