This noise-canceling microphone board features a built-in AI noise reduction algorithm, including noise suppression and automatic gain control. It enables omnidirectional sound pickup and suppresses all other noise except the human voice. It also supports an extendable microphone cable and USB interface for plug-and-play operation, making it ideal for voice recognition, human-computer interaction, voice calls, and other applications. Microphone Type: Dual Analog Noise-Canceling Microphones Number of Microphones: 2 Maximum Pickup Distance: Optimally within 5 meters Audio Capture Rate: 48kHz 16bit Sensitivity: -30 2dB Signal-to-Noise Ratio: 75dB(A) Sound Reduction: 20dB Directional Pattern: Omnidirectional Supported Functions: Voice Enhancement/Noise Suppression/Automatic Gain Control Convenient Features: Extendable Microphone Cable, Strong Compatibility/USB Interface, Plug-and-Play Algorithm Features: Noise Suppression/Voice Enhancement/Automatic Gain Control Connector: 1 x USB-4-pin-1.25mm Horizontal USB Power Supply Voltage: 5V 5% Power Consumption: Regular Operation: 5V, 0.2W, 40mA Color: As Shown Material: PCB Package Contents: 1 x Dual microphone module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.