VT200 Single Ear Telephone Headset Operator Headset With Mic,Spec: 3.5mm Double Plug With Tuning

1. Up and down retractable headband, adapt to various head shapes2. Using soft microphone cotton, can effectively reduce the background noise, more high definition and more comfortable calls.3. The hose has the resistance to bending, you can adjust the hose to the position you think comfortable.4. Comfortable ear cushions, fine texture, removable and replaceable5. Durable and resistant to wobble headset cable, pure copper impedance is low, the sound is not affected6. Four plug design, compatible with a variety of devicesSpeaker parameters:1. Size: 28mm diameter2. Distortion: less than 0.1%3. Impedance: 150 ohms4. Sensitivity: 118DB+/-3DB5. Frequency response: 200-4000HZMicrophone parameters:1. Microphone: omnidirectional2. Signal-to-noise ratio: greater than or equal to 52DB3. Distortion: less than 0.1%4. Impedance: 2200 Ohm5. Sensitivity: -34DB6. Frequency response: 100-3000HZ