Eliminates Transformer Hum:Engineered to neutralize DC offset, this filter eradicates transformer hum, enhancing audio quality. Dc Blocker Transformer|Dual-Stage DC Blocker:Features a patented 2-diode cascade design for superior DC removal, outperforming standard single-stage filters. Advanced EMI/RFI Filtering:Equipped with X/Y-class capacitors to suppress electromagnetic interference, ensuring clear audio signals. High Voltage Compatibility:Designed for AC high-voltage systems, this transformer is a reliable choice for electrical DIY projects. Overvoltage Surge Protection:Incorporates a 20D561K varistor to defend against surges up to 560V, safeguarding your equipment. Specifications Dual-channel two-stage DC blocking circuit Model: ZS-0016 WARNING: This product is for AC high-voltage power supply. Please be aware of the risk of electric from high voltage. Professional electrician work is required. Input Voltage: AC 110V-220V Output Voltage: AC 110V-220V Maximum Current: 20A Functions: 1. Eliminates DC voltage components in AC power supply (dual-channel two-stage filtering) 2. Surge protection, overvoltage protection. 3. Suppresses EMI electromagnetic interference. Board Dimensions: Length 80mm, Width 50mm, Height 30mm Net Weight: 88g Color: As Shown Material: Electronic Component Package Contents: 1* Two-stage DC blocking filter 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.