I bought razer black shark v2 x, but there is no code 7.1

and my product is not registered

You need to register it with your RazerID account here: https://razerid.razer.com/products

Then you’ll receive 7.1 Surround code directly on your email.

Hello Anonymous,

Please try to register your Razer BlackShark V2 X with your Razer ID and visit this link to request an activation code. Should you need additional help, PM me your device serial number and the email address so I can check your account and verify if there's a code allocated to it. Have a good one!

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