How do I find my serial number? February 25, 2021 23:05 Updated Your serial number is located on the front of the USB of your Duet PRO. It is an 8 digit number. Have additional questions? Contact us—we'd love to help! Related articles How to get started with MyVibes My Vesper button is jammed How should I care for my products to ensure longevity? How do I load patterns onto my vibe? Can I customize my Duet Pro from my phone or tablet?