Item Type: Call Center HeadsetMaterial: ABSAmbient Temperature: -10C To +40CRelative Humidity: 10%-90%Atmospheric Pressure: 86-106KpaAmbient Noise: 60dB (A)Sensitivity: -403dB (0dB=1V Pa, At1KHz)Impedance: 2.2K OhmDistortion: 5%Sensitivity: 1003dBPackage List1 x Call Center Headset1 x Instruction Manual1NOISE CANCELING MICROPHONE: Call center headset has a built in voice noise reduction processor with ENC noise reduction technology, which uses intelligent voice algorithms to eliminate background noise. 2INTIMATE DESIGN: Office headset is ergonomically designed the boom can be rotated 180 degree and the microphone can be rotated 330 degree, making the voice output smoother and the call clearer. 3PROFESSIONAL: Phone headset supports one touch mute and volume adjustment. The microphone pole can be freely bent inside and outside to achieve precise adjustment of microphone position. 4ADJUSTABLE: Service headphone design adjustable premium steel headband, adapt to the size of the head, arbitrary expansion without scratching hands, reduce pressure, easy to adjust. 5INTELLIGENT: Wired call center headphone is optimized for voice environments with sample rate conversion, equalization, dynamic range control and sound signal processing to give you the most comfortable experience.