Product Name: Surge Protector Arrester; Connection Type: RJ45; Nominal Discharge Current (Isn): 5 KA Max. Discharge Current(I): 10 KA; Data Transfer Rate: 100MHz Wire Length: 26 cm/10.2"; Dimensions: 7.9 x 2.5 x 2.5 cm/3.1" x 1" x 1" (L*W*H) Main Color: Black, Silver Tone; Material: Aluminum, Plastic Net Weight: 70g Protects your Ethernet device from damage and surges. Used to protect the coaxial data transmission of network communication circuit systems, such as computer network communication systems, repeaters, switches, routers, and other Ethernet devices. Easy to install. Install between the Ethernet and the device first, the "IN" end is for input and the "OUT" end is for output to the device, then set the ground wire well and straight. Package Contents: 1 x Surge Protector Arrester Note: Light 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.