Feature: 1. NOISE 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. 2. INTIMATE 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. 3. PROFESSIONAL: 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. 4. ADJUSTABLE: Service headphone design adjustable premium steel headband, adapt to the size of the head, arbitrary expansion without scratching hands, reduce pressure, easy to adjust. 5. INTELLIGENT: 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. Specification: Item Type: Call Center Headset Material: ABS Ambient Temperature: -10°C To +40°C Relative Humidity: 10%-90% Atmospheric Pressure: 86-106Kpa Ambient Noise: ≤60dB (A) Sensitivity: -40±3dB (0dB=1V Pa, At1KHz) Impedance: 2.2K Ohm Distortion: ≤5% Sensitivity: 100±3dB Package List: 1 x Call Center Headset 1 x Instruction Manual