Features: Function: When the microphone detects speech, it lowers the volumes of background music. It automatically returns to normal when the speaking stops. Microphone Input Interfaces:6.35mm: Suitable for dynamic microphones, conference gooseneck condenser microphones. 3.5mm: Supports three-poles plugs, with built-in bias suitable for 5V condenser microphones. Due to the wide variety of condenser microphones and different plug combinations, please be careful to distinguish. Explanation of the Three Adjustable Resistors' FunctionsSensitivity: The minimum microphone volumes required to the ducking effect. Recovery Time: The time it takes for the background music to return to its normal playback volumes after the microphone stops receiving input. Depth: The degree to which the background music volumes is reduced when the ducking effect activates (i.e., when the microphone is in use). This can ranges from complete muting of the background music to retaining a moderate levels of it. Specifications: Component: PCB Size:Approx.99x55mm/3.9x2.16inch Power Consumption: 0.25W Power Supply: DC12V-24V; please use a quality power adapter for power supply. Microphone Amplification Gain: 36dB Microphone Input Impedance: 2KΩ Input Gain: 0dB Input Impedance: 50KΩ Output Impedance: 600Ω Package Includes: 1pc Sound signals Mixer Board note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.