This product adopts the principle of 1/4 short-circuit wavelength to achieve good protection effect. The arrester has a solid structure, beautiful appearance and convenient installation. One end is connected to the antenna, and one end is connected to the feeder. The side of the arrester has a screw ring for grounding. It can be inserted into a thick copper wire and pressed tightly with a vise. Then the other end of the copper wire is connected to the protection net on the top of the building. The contact must be sufficient. new and high quality requency Range:DC-1000MHz V.S.W.R less than equal 1.1 Loss less than equal 0.2dB Withstand power:400W PEP Voltage at discharge start:DC350V+-15% Discharge voltage of (1 x 40)uS:1,000V Withstand current of (1 x 40)uS:6,000A Repetitive discharge of (1 x 40)uS 500A,over 500 times:DC350V±20% Insulating resistance DC 100V:Over 10,000M ohm Colour:As Shown Material:Metal Package Contents: 1 x CA-23RP Surge Protectors 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.