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TypeA = For computer and camera: fit for computer and camera, Also include some support 3-pole interface device.
Type B = For Mobile and Laptop: fit for Mobile Phone and Laptop, also include some support 4-pole interface device.
Directivity: Omni-directionalFrequency Range: 20-20KHzImpedance: 480KΩSensitivity: -47dB±3dBPlug type: stereo 3.5mmColor: BlackCable length: 2.5MMic diameter: 6.0*5.0 mm
Receive Range:Powerful receive <30cmClear receive <1meterNormally receive <3meter
For computer and camera
For Mobile and Laptop