Champion CWP-STHS-BLK 3.5mm Mono Black Headset with 2.5mm Adapter - Carrier Packaging - Black For use with 2.5mm or 3.5mm ported phones Meets strict hands free law restrictions and regulations Stereo (dual) ear bud design Headset has a 3.5mm jack end and includes a 2.5mm adapter Listen to music without missing a call