Poly CS540 XD Extra Density Convertible Headset TAA Hands-free productivityTheCS540 convertible DECT™ headset provides professional performance so you can get more done - even on the move. The noise-canceling mic reduces background noise interruptions, ensuring great audio quality and easing listener fatigue.Give everyone more freedom to move Everyone in the office could use more flexibility. Let them roam confidently up to 400 ft from the headset base. They'll be able to collaborate simply since teams can conference up to four headsets on a single base. The choice is yoursThere's more than one way to make a call - switch up styles to find your groove and introduce your ears to something new. TheCS540 convertible design comes with three wearing options: over-the-ear, over-the-head, behind-the-head . It's just easy Simplify desk phone management with headset audio controls and adding either the HL10 Handset Lifter or Electronic Hook Switch Cable (EHC) for remote call capabilities. Extended range and talk timeThe adaptive power system optimizes for range and talk time by automatically downshifting to low power when the headset is close to the base - saving battery life and maintaining maximum density. SoundGuard technology SoundGuard acoustic limiting technology protects against Acoustic Shock by limiting sounds to below118dBA ensuring listening comfort and protection against audio spikes. Superior audio qualityYour choice of narrowband audio to extend talk time or advanced wideband audio for high - definition voice quality. Enhanced Digital Signal Processing (DSP) provides more natural sound, delivering clear audio the way it's intended to be heard. Sharp looking over head design will give you a comfortable fit Enjoy detailed wireless audio with these CS540 XD Earset DECT wireless technology keeps your conversations safe and secure Sit comfortably anywhere in your room as the CS540 XD offers wireless range of up to 350 ft (106.68 m) Listen to your tape recordings or use them when listening to telephone calls on Skype with these mono sound Earset Outer-ear earset features DECT wireless technology Listen to deep lows and euphoric highs with a frequency range of sound from 20 Hz-20 kHz table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; } Product Type: Earset Battery Rechargeable: Yes Earpiece Design: Over-the-head Earpiece Type: Monaural Minimum Frequency Response: 20 Hz Maximum Frequency Response: 20 kHz Integrated Microphone: Yes Batteries Required: Yes Wireless Operating Distance: 350 ft (106.68 m) Taa Compliant: Yes Color Family: Black Color: Black Connectivity Technology: Wireless Product Series: CS500 XD Brand Name: Poly Battery Talk Time: 7 Hour Features: Hands-free Form Factor: Outer-ear Manufacturer: HP Inc. Product Model: CS540 XD Product Name: CS540 XD Extra Density Convertible Headset TAA Wireless Technology: DECT Application/Usage: Business Manufacturer Part Number: 7E2J7AAABA Manufacturer Website Address: http://www.hp.com Microphone Technology: Noise Cancelling Battery Chemistry: Lithium Ion (Li-Ion) Sound Mode: Mono Sound Pressure Level: 118 dB Limited Warranty: 1 Year Weight (Approximate): 0.64 oz (18.14 g) Feature1: Sharp looking over head design will give you a comfortable fit Feature2: Enjoy detailed wireless audio with these CS540 XD Earset Feature3: DECT wireless technology keeps your conversations safe and secure Feature4: Sit comfortably anywhere in your room as the CS540 XD offers wireless range of up to 350 ft (106.68 m) Feature5: Listen to your tape recordings or use them when listening to telephone calls on Skype with these mono sound Earset Feature6: Outer-ear earset features DECT wireless technology Feature7: Listen to deep lows and euphoric highs with a frequency range of sound from 20 Hz-20 kHz