Non-intrusive neck worn design with flat, no tangle cables. Bluetooth includes a free control app that allows for complete control using your smart phone. Retractable, digital earbuds. Rechargeable. Hi-Gain omnidirectional microphones for clear sound enhancement. Includes 3 pairs of foam tips. Integrated micro USB port with charging cable. Four frequency modes: Universal, Speech clarity, Hi-frequency, and Power boost. Independent volume control. Requires (1) Lithium battery (included). Boxed with hanging tab.