Single machine operation Two independent signal channels and masked channels Air conduction 125~8000Hz; Bone conduction 250~6000Hz; A total of 11 frequncy points 10dB ~ 120dB AC test; Warble tests; Pulse tests; Narrow-band noise tests 3dB ~ 5dB Air conduction earphone; Bone conduction earphone USB interface for PC Built-in microphone and speacker LCD display screen; Double line accurate numerical display Temperature 10°C~40°C. relative humidity ≤ 90%. air pressure 86KPa~106KPa
