Features: Brand new and high quality. The first stage is the RFI filter DC circuit. Using two 50A bridge stacks and four 35V2200UF capacitors, it filters the DC component of the AC power supply to suppress humming caused by transformer saturation or increased static current. Differential mode filtering: two differential inductors provide differential mode filtering for the AC power supply, suppressing mid- and high-frequency interference. First-level common mode filter: achieved through an X2 capacitor and a common mode inductor, forming the first-level common mode filter. Second-level common mode filtering: utilizing a two-stage filtering approach for improved effectiveness. It can also inhibit issues like fast transient group pulse interference with repetition rates of several kilohertz. This module, used with a decoder or power supply, filters the DC component of the power supply, eliminates and suppresses transformer hum, cleans high-frequency noise in the power supply, purifies the power, and significantly enhances audio quality, improving resolution and creating a quieter background. Specifications: Name: Power EMI Filter Input Voltage: AC 110V-250V (max 250V) Output Voltage: AC 110V-250V Working Current: 4A / 10A / 20A (optional) Board Size: 108mm x 50mm Note: No retail package. Please allow 0-1 cm error due to manual measurement. Please ensure you don't mind before bidding. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1pc x Power EMI Filter