CS540: Wireless solution, lightweight and stylish headset can be converted into 3* styles: over the ear, headband & behind the neck design, up to 7 hours talk time, up to 350ft range (depending on environment), audio controls volume/mute at your fingertips, conference in up to three additional headsets for enhanced collaboration, advanced wideband audio using CAT-iq technology for high definition voice quality

HL10: Automatically lifts handset on a wide range of telephone systems, suitable for use with the CS500 series wireless headset systems

* Neckband sold separately