Plantronics Wireless CS540 Convertible DECT Headset: Stylish, reliable, & versatile The Plantronics CS540 is currently the lightest DECT headset on the market & offers outstanding performance with a range of over 100 m (328 ft) sophisticated sound technology, & adaptive power system for longer talk-time & standby. Compatible with most business phones the headset can be used to answer & end calls remotely when used with an Electronic Hookswitch Cable or Handset Lifter (sold separately) for added convenience. Extremely compact & comfortable to wear, as a convertible headset, the CS540 can be worn over the head or over-the-ear to suit individual preference. Key Features With up to 7 hours of continuous talk time, the CS540 performs dependably in busy office environments whilst affording the flexibility & comfort to move away from your desk. & with advanced CAT-iq wideband audio combined with enhanced DSP, & noise cancelling microphone, the CS540 ensures you can hear & are heard on every call. Why should you buy this headset? The style, versatility & high-spec design of the CS540 will provide long-term performance for any office.