SoundLogic 2-In-1 Rechargeable Stereo Speaker Headphones - Retail Packaging - Black 2-in-1 Stereo Headphones & Speaker system with Deep Rich Bass. Connect to ANY Audio Source via 3.5mm Compatible Audio Jack. 3.5mm Detachable Audio Cable and USB Charging Cable Included. Built-in Volume Control & Mode Selection Button to switch from Headphone to Speaker. Built-in USB Rechargeable Battery for Hours of Music. Adjustable Head Band and Pivoting Speakers. USB Compatible Power Source.