Was notified today through newsletter. I've already used the deal before and the Qantas deal https://www.ozbargain.com.au/node/435708 is better for (elite 65t/active only).
- Go to the deal website.
- Join if you haven't already.
- Receive a 30% off voucher code (they're proabably unique)
- Buy using the official Jabra website.
Edit: It seems the offer is only valid for Jabra Elite Active 65t. The Qantas offer is better in that case.