Zalman ZM-DS4F 2-Way 4 Speaker Foldable Earcup Dual Stereo Headphones w/3.5mm Jack (Black) - 2 Diaphragms Per Channel! Zalman ZM-DS4F 2-Way 4 Speaker Foldable Earcup Dual Stereo Headphones General Features: Black color Over-the-head design Mini Earcup design with ear cushions Ultra broad band sound Compact 3-point folding headband for convenient mobility Dual Stereo Method (w/Total of 4 Speaker Units) Neodymium magnet speaker units 28 mm Tweeter: Provides Ultra-Clear Highs