Chelsea Online

First we made it lighter. At only 21 grams, the CS500 Series features the lightest DECT headset on the market (CS540). That means all-day comfort for all-star performance. Then we made it better. Increased range for maximum mobility, one-touch controls, energy efficient power management, simple plug-and-talk installation — the CS500 Series does it all. Make a good call with the new standard in wireless desk phone headset systems.     - Range up to 350 feet away for maximum mobility - Offers you a choice of four comfort-tested wearing options to match your personal style  - Premium wideband audio quality  - One-touch call answer/end, vol +/-, and mute  - Adaptive power management system optimizes for range and talk time  - Conference in up to three additional CS500 or Savi headsets for enhanced collaboration  - Guest headsets can subscribe to a base by simply docking the headset  - Use with Electronic Hook Switch Cable or Handset Lifter to remotely answer/end calls