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. The CS5400 has a range of up to 350 feet or maximum mobility and offers a choice of four comfort-tested wearing options to match your personal style. With premium wideband audio quality, one-touch call answer/end, vol+/- and mute and the option to conference in up to three additional CS500 or Savi headsets, this headset is the one to have. Make a good call with the new standard in wireless desk phone headset systems.