The Archer EMI/RFI attenuates radio frequency interference, conducted into or out or electronic equipment. There are two different modes of RFI common mode interference is present as a voltage from all of the power connections to ground. Differential mode interference is present as a voltage between the power connections. The Archer EMI/RFI Filter is effective against both types of interference. this interference can be generated by transmitters computers and peripherals, switching power supplies heavy appliences and microwave ovens etc.
Unopened, not tested sold spares and repairs