The CS500 Series is a super-lightweight DECT headset with a 120 metre wireless range, ideal for working in busy hot-desking environments, & with the ability to connect up to four headsets on a single call. Quick set-up & high-quality audio. Pair with a base unit simply by docking the headset, enabling quick set-up in hot-desk environments. CAT-iq wideb&, DSP & a host of other advanced audio features deliver crystal clear, natural voice call clarity.