Protects your Ethernet device from the damage of lightning and surge. Used to protect the coaxial data transmission of network communication circuit system, such as computer network communicationsystem, repeater, switchboard, rounter and other ethernet devices. Easy to install. Install between Ethernet and the protected device first, "IN" end is for input and "OUT" end is for output to the protected device, then set ground wire well and straight. Product Name : Surge Protector Arrester Connector Type : RJ45 Rated Discharge Current (Isn) : 5 KA Max. Discharge Current(I) : 10 KA Data Transfer Rate : 100MHz Wire Length : 26cm/10.2inch Dimension : 7.9 x 2.5 x 2.5cm/3.1inch x 1inch x 1inch (L x W x H) Color : Black, Silver Tone Material : Aluminum, Plastic Net Weight : 140g Package Content: 2 x Surge Protector Arrester. 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.