Protects your Ethernet device from damage caused by lightning strikes and surges. Used to protect the coaxial data transmission of a network communication system, such as a network communication system, a repeater, a control, a display, and other Ethernet devices. Easy to install. First install between the Ethernet and the protected device, with the "IN" end as the input and the "OUT" end as the output to the protected device, and then ground it correctly and straight. Product details: Protective surge protector Connector type: RJ45 nominal discharge (Isn): 5 KA Max. discharge (I): 10 KA data transfer: 100 MHz Length of: 26 cm Dimension: 7.9 x 2.5 x 2.5 cm / 3.1 in x 1 in x 1 in (L * W * H) Color: Black, Silver Tone Material: Aluminum, Plastic Net weight: 70g Package contents: 1 x Surge Protector Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3 cm.