Feature:1. This product is suitable for all audiometer types of air conductivity detection and testing.2. Stable listening frequency is stable, high sensitivity the test result is accurate.3. Ergonomic designs, comfortable to wear, easy and convenient to use.4. Suitable for provincial CDC (Centers for Disease Control), municipal physical examination centers, otolaryngology departments in major and small hospitals, training schools for deaf children, driving schools, hearing clinics, hearing aid stores, etc.5. Designed to provide highsensitivity, lowdistortion and a wide, smoothly frequency response.Specification:Condition: 100% Brand NewItem Type: Audiometer HeadphoneMaterial: Plastic + Metal Earphone Type: HeadphoneInsert Plug Type: straight typePurpose: Audiometer air conductivity detection and screeningImpedance (DC) : 10 Ohm 1.0 OhmContinuous Rated Power: 1000mW(milliwatt) at any frequency from 100 to 8000HzInput/Output Linearity: 1000 mW(milliwatt) 1 dB at inputPlug Diameter: Approx. 6.5mm / 0.3inSensitivity: 3dBDistortion Rate: 3%Color: BlackAudiometry Frequency: 125-8000HzThis product has been thoroughly tested/inspected from the factory and found to have complete function, please feel free to purchase.Main Customer Groups:Provincial CDC (Centers for Disease Control), municipal physical examination centers, otolaryngology departments in major and small hospitals, training schools for deaf children, driving schools, hearing clinics, hearing aid stores, etc..Package List:1 x Audiometer Headphone