Samsung Blackjack II (i617) Port to 3.5mm Stereo Headphone Adapter (2-Pack), Black This adapter is ONLY compatible with the Blackjack II (i617) Specifically designed to work with your Cingular Blackjack or Samsung i617 Smartphones Durable, compact, and lightweight Simple innovative and functional design Works great with JAVOeBuds or with any other stereo headphones or speakers