Extend your wifi antenna over 20 feet for better reception, closer to where you're working, phoning, gaming, tv watching, or computing. Comes with a 40" cable attached + another 17-foot cable to give you over 20' of cable length. Wifi extender. Excellent condition. UPC Code 4718050300204.This installs by unscrewing one of the wifi antennas on your router and screwing the cable from this antenna in its place. Make sure your router antenna attachment is compatible before purchasing.This is a special combination kit containing an Alfa ARS-N19 9dBi gain omni directional antenna, paired with a heavy duty magnet base with RP-SMA connector and 40" cable, and another 17 feet of high quality extension cable.