Jabra HALO Bluetooth Stereo Headset - Retail Packaging Enjoy wireless music and answer phones calls in crystal clear stereo sound Over-the-head, foldable design that fits neatly into a compact carrying case Zirene Power Bass for audio enhancement, Noise Blackout technology to monitor and balance incoming audio volume Corded option for non Bluetooth-enabled phones, MP3 players, etc. Up to 8 hours of music playback and talk time, up to 192 hours (8 days) of standby time