Specification: Item Type: Traffic Headset_x000D_Material: ABS_x000D_Ambient Temperature: -10-+40_x000D_Relative Humidity: 10%-90%_x000D_Atmospheric Pressure: 86-106Kpa_x000D_Environmental Noise: 60dB(A)_x000D_Sensitivity: -403dB (0dB=1V/Pa, at 1KHz)_x000D_Impedance: 2.2K Ohms_x000D_Distortion: 5%_x000D_Sensitivity: 1003dB_x000D_Scope of Application: for Telephones with RJ9 Headphone Jack Features: 1Noise Reduction Mic: Built in voice noise reduction processor, using ENC noise reduction technology, using intelligent voice algorithm to eliminate background noise. 2Ergonomic Design: Firm and durable, the boom can be rotated 180, and the microphone rod can be rotated 330, making voice output smoother and calls clearer 3Adjustable Microphone Rod: The adjustable microphone rod can be bent inside and outside freely to achieve precise adjustment of the microphone position. 4High Quality Steel Headlband: Retractable and adjustable, adapt to the size of the head, free to retract without rowing, reduce oppression, easy to adjust 5Spring Wire: The Business Headphone has a spring wire, which can be stretched at will to avoid the wire being too long and entangled. PackageList: 1 x Traffic Headset