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.How to Use:Plug and play.Specification:Item Type: HeadphoneMaterial: TPEPlug: Approx. 3.5mm/0.1inRope Length: Approx. 1.25m/4.1ftFrequency Response: 20-20kHzResistance Impedance: 150ΩSensitivity: 108dBMaximum Input Power: 10MWApplication: 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.