The Plantronics CS540 is a convertible DECT headset offering a stylish, reliable, and versatile solution for office communication. It is the lightest DECT headset on the market, providing outstanding performance with a range of over 100 m (328 ft), sophisticated sound technology, and an adaptive power system for extended talk and standby times. The headset is compatible with most business phones and can be used for remote call answering and ending when paired with an Electronic Hookswitch Cable or Handset Lifter (sold separately). Its compact and comfortable design allows for over-the-head or over-the-ear wearing styles to suit individual preferences. Key Features include up to 7 hours of continuous talk time, making it dependable for busy office environments while offering flexibility and comfort. Advanced CAT-iq wideband audio, enhanced DSP, and a noise-canceling microphone ensure clear communication on every call. Specifications: Battery charging time: 180 minutes, Battery life: 7 hours, Bluetooth: Yes, Corded/Cordless: Cordless, Headset type: Mono, Included in delivery: Headset, Base station, Headset fit kit, Headband, Other size eartip and earloops, Power supply, Telephone interface cable, Operating Frequency: 100 - 6800 Hz, Range: 120 m, Standby time: 30 hours, Suitable for: Deskphone, Talk time: 7 hours, Type of headphone: Over the ear/ear, Weight: 21g, Wired/Wireless: Wireless, Colour: Black.