Application introduction: This product is suitable for high-voltage isolation between cable TV home cables and TV sets or set-top boxes. Cable TV cables usually share poles with power lines and telephone lines. After long-distance transmission, they may sense higher voltages, contact leaking wires, sense anti-thunder, and may be connected to electrical equipment with leakage in some users' homes. All of the above reasons cause the TV cable to be . If the TV cable is not grounded well, high voltage electricity be transmitted to the user', forming a potential difference between the power grid ground wire and the cable TV network ground wire, causing ground interference. This interference can cause TV image distortion, , mesh patterns and sound distortion, etc., causing mosaics in the set-top box, and even damage to TV sets, set-top boxes and other electrical appliances. The isolation protector can the potential difference between the power grid and the cable TV network, improve the TV's viewing effect, and protect the safety of household appliances. Cable TV cables usually share poles with power lines and telephone lines. After long-distance transmission, they may be induced by higher voltages, contact with leaking wires, or be induced by anti-thunder, which may cause the TV cables to be . If the TV cable transmits high voltage electricity to the user', this interference may cause distortion of the TV image, , mesh patterns, and humming sounds, etc., or even damage to electrical appliances such as and set-top boxes. Therefore, every TV needs to be installed. Don't lose the big picture because of the small details, and then regret it. Colour:Black Material:Metal Due to different batches, there may be differences in product appearance and printed text, which not affect use Package Contents: 1 * isolator 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.