BUILT FOR AMAZON LUNA – Designed to provide an ideal playing experience on Luna, Amazon's cloud gaming service. WORKS ACROSS YOUR DEVICES – Windows, Mac, Fire TV, Fire tablet, iPhone, iPad, Chromebook, and Android devices. SEAMLESS SCREEN SWITCHING – When playing on Luna, pause your game on one screen then pick up right where you left off on another. Note : If the size of the earbud tips does not match the size of your ear canals or the headset is not worn properly in your ears, you may not obtain the correct sound qualities or call performance. Change the earbud tips to ones that fit more snugly in your ear