Features: Flexible rotatable microphone can be adjusted to a suitable position at any time. It’s also great for call centers, truckers, and remote employees. This headset provides you a comfortable wearing experience for intensive use. The soft cushion ear pad provides a comfortable around ear fit for listen. You can adjust the headband to most comfortable size for your head. Prevent the headphone from slipping of your head. Experience clear communication with our noise cancelling headset, featuring for both computers and smartphones. Whether in office, traveling, studying, or simply enjoy entertainment, this headset provide exceptional even in noise environment. Specifications: Component:Plastic Headphone cable length: Approx.2M/78.74inch Horn diameter: Ф40mm. Speaker impedance: 32Ω. Speaker frequency response: 20H -20KHz. Speaker sensitivity: 115dB Output power: 41MW Output power: 84MW Noise: ≤-78dBA Microphone specifications: 6x5mm. Microphone sensitivity: -52dB. Microphone impedance: ≤2.2KΩ. Microphone frequency response: 50Hz-15KHz Package Includes: 1Pc RJ9 Headset note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.