USB Microphone For Raspberry PiFeature:1. Sensitivity: -47dB ± 4dB2. Sensitivity reduce: -3dB at 1.5V3. Working Voltage: 4.5V4. Frequency response: 100 ~ 16kHz5. SNR: More than -67dB6. Cable length: 0.7-0.9MThe effective distance of 2 meters or moreP..