Yes, FocusPLUS PRO is compatible with HeadPLUS v1.
However, your HeadPLUS v1 may be available for a TradeUP credit, allowing you to purchase the latest generation of the HeadPLUS, the HeadPLUS v2, at a discounted price. Visit our website here to learn more about your TradeUP options. The HeadPLUS v2 is compatible with the FocusPLUS PRO as well.
Please contact our customer support team with any questions, and we'll be more than happy to help!