Feature:1. Single Ear Hook Type: Ear hook earphone, easy to use, ergonomic design, comfortable to wear, uninterrupted use, small appearance, light weight.2. High Quality Microphone: Active noise reduction, anti static, high sensitivity built in microphone, flexible pole, ensure accurate speaking position, provide quality communication.3. Removable: Headset's earhook can be freely replaced, and the left and right ears can be worn at any time, it can be expanded and contracted according to the size of the auricle.4. High Quality Material: Free large, medium and small earphone silicone sleeves, suitable for long term wearing, soft hand feeling, tensile strength wire and durable gold plated plug.5. Strong Compatibility: Headphone is suitable for all mobile phones, computers and other devices with 3.5mm interface, and can be used in online courses, call centers, teleconferences, etc.Specification:Item Type: HeadphoneMaterial: TPESpeaker Parameters / Microphone ParametersDiameter: 15mmSensitivity: -52dBImpedance: 32Directivity: Directional EMCSensitivity: 110dB (5dB)Impedance: 2Frequency Response: 50-15kHzResistance Impedance: 150 ohmsSensitivity: 108dBMaximum Input Power: 10MWRope Length: Approx. 1.3-1.8m/4.3-5.9ftApplication: Call and Service Center, Travel, Teaching.Package List:1 x Headphone2 x Spare Earphone Silicone CaseNote:1. Please point the microphone to your mouth to get the best call effect.2. Manual measurement, please allow some errors.