buy Headphones with Headband Logitech H650E Black . Built-in microphone: NoConnections: USBUSB 2.0USB x 3WiredType: WiredHeadphones with MicrophoneFrequency response: 50 Hz-10 kHzMicrophone: 100 Hz-10 kHzCharacteristics: LED in operation indicatorInstallation guide includedApprox. dimensions: 16,5 x 17,4 x 5 cmColour: BlackSilverMaterial: PlasticType of headphones: External supraauralPower supply: WiredApprox. weight: 120 g120 grSound intensity: 90 dBRecommended age: AdultsMemory Type: DDR4Headphones: BinauralFrequency: 100 - 10000 HzSpeed: 6 GbpsIncludes: Transportation coverRecommended use: Office/Call center The double-ear, corded headset with enterprise-grade audio that people actually want to use.Double-ear (stereo) corded designIdeal for employees who need to block off surrounding noise for laser-like focus during desktop calls.Combines enterprise-audio quality with the human-centric design Logitech is known forComfortable, stylish and intuitive so people actually love to use them – further enhancing UC collaboration in your workplaceIn-call LED red-light indicatorLocated on the backside of the boom, this red light provides a visual alert to those behind you that you are on a call, preventing accidental disturbances during calls.Quick-access inline controllerControl the call with answer/end, volume up/down and mute buttons. The volume-up button is strategically built higher than the others providing a point of reference for your fingers and allowing you to control the call without looking away from your work.Flat no-tangle cableAvoid cord tangles so you can put the headset on quickly and easily without the mess.Acoustic echo cancelation and noise-cancelling microphoneOptimized so you can hear and be heard even in noisy workspaces.Digital Signal Processing (DSP)Enables precise tuning for both the mic and speaker so conversations are more life-like.Contemporary, ultra-lightweight designSleek design and durable materials provide a more attractive look than traditional headsets.Flexible microphone boomRotate the boom up or down and bend it left or right to move it closer to your mouth, enabling optimal placement for voice pickup.Optimized for Microsoft® Lync™ Compatible with most leading UC platformsEnsures enterprise-quality audio and an integrated experience with most all business-grade UC platforms.Dynamic equalizerAutomatically switches between voice and music modes, delivering the best sound quality for what the user is listening to.Wideband audioHear and be heard in true wideband audio, ensuring those on both sides of the call enjoy a lifelike listening experience.Padded leatherette headband and earpadsBuilt with high quality materials so the headset remains comfortable, even during long hours of use.Cloth zipper bag includedProtect your headset at the desk or on-the-go with a premium velvet carry bag. Product type: HeadsetWearing style: Head-bandRecommended usage: Office/Call centerProduct colour: Black, SilverHeadset type: BinauralConnectivity technology: Wired3.5 mm connector: N2x 3.5 mm connectors: NUSB connectivity: YEar coupling: SupraauralHeadphone frequency: 50 - 10000 HzHeadphone sensitivity: 90 dBTotal Harmonic Distortion (THD): 4%Microphone type: BoomMicrophone frequency: 100 - 10000 HzMicrophone sensitivity: -45 dBMicrophone direction type: Bidirectional microphoneMicrophone mute: YWindows operating systems supported: Windows 7 Home Basic,Windows 7 Home Basic x64,Windows 7 Home Premium,Windows 7 Home Premium x64,Windows 7 Professional,Windows 7 Professional x64,Windows 7 Starter,Windows 7 Starter x64,Windows 7 Ultimate,Windows 7 Ultimate x64,Windows 8,Windows 8 Enterprise,Windows 8 Enterprise x64,Windows 8 Pro,Windows 8 Pro x64,Windows 8 x64,Windows Vista Business,Windows Vista Business x64,Windows Vista Enterprise,Windows Vista Enterprise x64,Windows Vista Home Basic,Windows Vista Home Basic x64,Windows Vista Home Premium,Windows Vista Home Premium x64,Windows Vista Ultimate,Windows Vista Ultimate x64Mac operating systems supported: Mac OS X 10.7 Lion,Mac OS X 10.8 Mountain LionWidth: 174 mmDepth: 50 mmHeight: 165 mmWeight: 120 gQuick start guide: YCarrying case: Y2.5 mm connector: NTransducer type: Back electret condenser