User hears ambient sound via bone conduction. Ability to listen to music and take phone calls via Bluetooth. Omni-directional microphones. Independent volume control. Sound activated compression. Rechargeable. Micro-USB cord included. Comes with GWP-FP plugs for 33dB NRR. Requires (1) Lithium battery (included). Boxed with hanging tab. May not ship to Australia. May not ship Post Office.