4 Pack Vacuum Cleaner HEPA Filters for Cyclonic Series RO3753EA RO3731EA RO3786EA Notice: High voltage danger, beware of electric shock!<br> Eliminate the interference of DC components from AC 110V-220V home appliances such as frequency-converted air conditioning, electronic switching power supply, refrigerator, charger etc. Using diodes and capacitors to build a DC elimination circuit, the DC component in the mains AC power supply is eliminated and blocked, preventing the transformer from magnetic saturation or static current increase due to the DC component.<br> This module is used in conjunction with a decoder or power amplifier to filter the DC component of the power supply, eliminate and suppress the hum of the transformer, the high-frequency noise in the power supply, purify the power supply, and can significantly improve the sound quality of the power amplifier, enhance the resolution and make the background quiet.<br> Features:<br> Input Voltage: AC 110V-220V<br> Output Voltage: AC 110V-220V<br> Working Current: 25A<br> Function: 1> Eliminate the DC voltage component of the AC power supply.<br> 2> Surge protection, overvoltage protection.<br> Board Size: 105x48x26mm(L*W*H)<br> Weight: about 100g