Mondial coax antenna ground isolation unit

Never used but has some minor box storage wear.  Mondial Antenna Ground Isolation Circuit (aka MAGIC) Box provides one isolated outlet for a video signal to improve picture quality by eliminating hum and noise from cable-TV or rooftop antenna signal lines. Condition: Used, Condition: MONDIAL ANTENNA GROUND ISOLATION CIRCUIT is in good overall condition. There are marks on the outside as it is used. ( SEE Pictures ), Brand: MONDIAL, Type: ANTENNA GROUND ISOLATER, Model: MAGIC, Country/Region of Manufacture: United States