Feature: 1. Noise Reduction: ENC noise reduction technology optimizes sample rate conversion, equalization, dynamic range control, acoustic sound cancellation and sound signal processing for speech environments. 2. Ultra Clear Call: The business headphone uses intelligent voice algorithm, ultra clear call, suitable for telephones with RJ9 headphone jack. 3. Ergonomic: Firm and durable, the boom can be rotated 180°, and the microphone rod can be rotated 330°, making the voice output smoother and the call clearer. 4. Adjustable Microphone Rod: The microphone rod can be freely bent inside and outside to achieve precise adjustment of the microphone position. 5. High Quality Steel Headlines: Retractable and adjustable, adapt to the size of the head, free to retract without rowing, reduce oppression, easy to adjust. Specification: Item Type: Traffic Headset Material: ABS Ambient Temperature: -10℃-+40℃ Relative Humidity: 10%-90% Atmospheric Pressure: 86-106Kpa Environmental Noise: ≤60dB(A) Sensitivity: -40±3dB (0dB=1V/Pa, At1KHz) Impedance: 2.2K Ohms Distortion: ≤5% Sensitivity: 100±3dB Scope of Application: for Telephones with RJ9 Headphone Jack. Package List: 1 x Traffic Headset