Description Specifications Poly Plantronics CS540 Wireless Headset Hands-free productivityThe CS540 convertible DECT a headset provides professional performance so you can get more done a even on the move. The noise-canceling mic reduces background noise interruptions, ensuring great audio quality and easing listener fatigue. FeaturesOn-ear earpiece design offers comfortable listening for a longer durationOn-ear earpiece design ensures maximum convenience and optimal performanceEffectively eliminates the hassle of getting tangled with wires with great freedom of movementNoise Cancelling microphone technology ensures maximum dependability and optimal performanceVolume earpiece control for enhanced, dependable pointing efficiency with maximum usabilityVolume earpiece control for optimal performance and maximum reliabilityGo wireless and enjoy the music you love with the CS540A EarsetGo wireless and enjoy the music you love with the CS540A earsetFits cosily in your ears for extended periods of comfortable listeningIn-ear earphones for comfortable listeningBoom mic lets you chat with your friends & family on Skype and on multiplayer network gamesYour voice will be heard loud and clear with the boom microphoneGreat for Audio/Visual Labs, Assisted Listening Systems and more that have a Mono jack for non-stereo useDECT wireless technology keeps your conversations safe and secureStay connected smoothly with a wireless range of 12000 cm Category Description Controls/Indicators Earpiece Controls: Volume Earpiece Earpiece Design: On-ear Earpiece Type: Monaural Microphone Microphone Technology: Noise Cancelling Microphone Design: Boom Physical Characteristics Form Factor: In-ear Color Family: Black General Information Product Type: Earset Manufacturer Part Number: 8J8V4AAABB Manufacturer Website Address: http://www.hp.com Manufacturer: HP Inc. Product Model: CS540A Product Name: CS540A Earset Product Series: CS500 Brand Name: Poly Technical Information Sound Mode: Mono Sound Pressure Level: 118 dB Connectivity Technology: Wireless Features: Convertible Design, Ear Hook, Lightweight, Wideband Audio, SoundGuard Technology, Electronic Hook Switch (EHS) Capable, Digital Signal Processing (DSP) Wireless Technology: DECT Wireless Operating Distance: 12000 cm Sound Pressure Level (A-Weighted): 118 dB(A)