According to comments, you must register a Razer product to receive this offer, this is not confirmed though
Razer Surround gives gamers the best virtual 7.1 channel surround sound experience with any stereo headphones. Current generation virtual surround technologi.
Also, there is a chance that if you install Razer Synapse first, you may be eligible for this offer.
Direct Download Here
Installed Razer Surround, and the next thing I saw was 'UPGRADE'. I decided to go ahead and click it, and I was surprised by the dialog I got. An activation code was sent to my email linked to my Razer ID! I went ahead and checked it, and I got an email with subject 'Activation Code for Free Upgrade to Razer Surround Pro'. I got the key, and everything worked fine.
Proper steps:
- Install Razer Surround
- Sign Up/Sign In to your Razer ID
- Find & click on the 'UPGRADE' button
- Check your email account for an email from RAZER with a subject 'Activation Code for Free Upgrade to Razer Surround Pro'
- Copy the activation key
- Paste it into the activation box
Razer Surround Pro Serial Key
Enjoy your better headphone experience :)