A 500 watt isolator to suppress common mode currents carried back on the outside of your coax braid. These can be responsible for receiver noise and RFI.
Can also help if your RF is getting into your house hold audio and video systems.
Just place at the entry to your shack under the eaves or in a similar position
Can also be used near the antenna feedpoint as a choke.
Frequency: 1 to 60 mHz.
Type: 50 Ohms; Current.
Power: 500 Watts
Connectors: SO239, UHF Female
Weight: 120 Grams.