USB Headset for Call Center with Noise Cancelling Microphone for PC With USB chip of DSP technology for beautiful sound quality and perfect voice transmission, good choice for clear network communication Crystal Clear Chat – Great flex adjustable and reversible mic arm, high-sensitivity microphone picks-up your voice loud and clear High Quality Wideband HD audio sound, perfect for multimedia use and communication With voice recognition microphone for speech dictation and language learning Convenient In-Line Controls, volume up and down, microphone mute and hook switch optimized for Microsoft Lync Light weight and Large Luxurious protein leathrette ear cushion to reduce backgroud noise and for completely all day long comfort Durable headband with easy adjustment to fit for different head sizes Hearing Protection Hearing protection circuit limits any sound above 118dB. This keeps the sound level in the safe range and protects the user against sudden high peaks in volume. Rotatable 330°rotatable microphone arm enable headset to be worn on either side. 180°rotatable joint of speaker and headband for easy adjusting ear cover to properly sit on ears. Adjustable Headband Lightweight designed steel headband with cushion headpad ensures all day wear comfort. Adjustable Headband for Different Headsizes. Noise Cancelling The noise cancelling microphone will filter out background noise and deliver loud and clear sound. Flexible microphone boom can be easily adjusted for accurate talking position. Read more Volume Controller 1. Microphone mute: press the mute button to activate mute, press again to de-activate mute 2. Microphone mute LED indicator(red) 3. Speaker volume controller: press “+” to increase speaker volume, press“-” to decrease speaker volume" 4. Hook LED indicator (blue) 5. Answer/end call button (designed for certain special softphone only, not for all softphone platforms) Read more 8.Out Ringer Speaker Holes 9.Out Ringer Switcher Volume Controller(Circular) 1.Microphone Mute Button 2.Mic Mute LED Indicator（red） 3.Answer/End Call 4.Busy Status Indicator (Red when on call) 5.Volume - 6.Volume + 7.Busy Button Read more