The 859902 Wilson surge protector is an inline surge protector that can be used with all Wilson external antennas. The unit is installed inline between the antenna and the amplifier. Protection is given by a gas tube element, which can be replaced to provide multistrike capacity. A ground lug and terminal are supplied directly on the protector housing. The protector does not connect directly with the amplifier, and a small length of cable is needed. You can use the Wilson 9913 coaxial cable for this purpose.