WIRELESS Lag-Free 2.4 gHz Digital RF - Dedicated USB Wireless Adapter - 10 m Range - 850 mAh Battery MICROPHONE Frequency Response: 100 Hz - 10 kHz - Sensitivity: -45 dBV/Pa - Signal-to-Noise Ratio: >42 dBPick-Up Pattern: Uni-Directional SPEAKER Frequency Response: 20 Hz - 20 kHz - Drivers: 2 x...