No, HeadPLUS v2 PRO is not compatible with Slide Module v1. This is because Slide Module v1 requires a Link Cable to connect to a secondary device, and Link Cable is not compatible with the HeadPLUS v2 PRO.
The HeadPLUS v2 PRO is compatible with our previous generation Slide Module v2 and the latest generation, Slide Module v3.
Your Slide Module v1 may be available for a TradeUP credit, allowing you to purchase the compatible Slide Module v3 at a discounted price. Visit our website here to learn more about your TradeUP options.