- High-fidelity lossless audio transmission technology, 48KHz audio sampling frequency, sensitive pickup, clear voice, frequency response up to 30Hz-20KHz; - Using high sensitivity pickup, built-in automatic gain AGC function, effective pickup distance up to 50-60cm without distortion; - With microphone noise suppression circuit system, based on the fifth-order Butterworth low-pass filter voice noise reduction method of denoising the sound signal; - Selection of aviation-grade aluminum alloy body, high-precision CNC engraving 1930 diameter 0.6mm array of holes; - With 18mm round speech indicator, different identity speech and number indicator according to different color status display; - Comes with 1 professional cable, wire with full line aluminum foil, water line shielding, can effectively avoid and prevent line electromagnetic interference;