Amazon is offering its Prime members Official Luna Wireless Controller for $39.99 (regularly $69.99) with Free Shipping for a limited time.

Amazon’s Prime Day deals are exclusively for Prime Members. If you are not a Prime member, Amazon is offering a 7-day trial for $1.99.

This is the controller built for Amazon’s cloud gaming service, Luna. Its works across Windows, Mac, Fire TV, Fire tablet, iPhone, iPad, Chromebook, and Android devices. It connects directly to Amazon’s custom game servers using Cloud Direct technology for low-latency gameplay and lets you easy switch screens seamlessly and pick up right where you left off on another. It features an offset thumbsticks, easy-access bumpers, precise triggers, responsive action buttons, and a 4-way directional pad. Luna lets you play games on devices you already own. Prime members get a rotating library of games included in their membership. You can also subscribe to Luna+ for wider variety of games for $9.99/month.