TF-0301W Conference microphone Chairman Unit Datasheet Manual Firmware FeatureSpecification:ModelTF-0301wSensitivity– 41 ±1.5dB (0dB=1V/Pa,at 1KHz)Frequency8 0Hz~1 6k HzOutput Impedance –Dimensions196x134x63 mmWeightAbout 0.7 kgBattery capacity14400mAh