The A420 is a conference omnidirectional microphone that supports secondary cascading. It contains 8 array microphones, supports omnidirectional pickup within a range of 4.5 meters, and is equipped with proprietary audio algorithms, providing an excellent pickup experience in conference scenarios. The omnidirectional microphone supports secondary cascading, serving as both a primary microphone and an expansion microphone, allowing flexible configurations for different-sized conference rooms. Additionally, the A420 is equipped with a 5W high-power speaker for clearer vocals and an immersive experience.