Linksys WRT-series dual-band Wi-Fi router (such as the WRT1900AC or WRT3200ACM) 
Four Detachable Antennas / This router requires four external high-performance antennas to properly broadcast dual-band Wi-Fi. They screw directly onto the gold RP-SMA contact threads visible on the sides & back corners of the blue/black shell. Operating the router without them will drastically limit your wireless connection entirely 
Ethernet Cable / The original bundle includes a flat, high-speed Ethernet network cable (typically matching blue or yellow) to link the router's internet WAN port directly to your broadband internet modem

(Manual Not included)
(All Pieces including Router Included)
Power Adapter Brick / The large external power brick needed to convert electricity for the hardware 
AC Power Cord / The matching black wall plug cord that connects to the adapter brick 
USB/Data Peripheral Cable / A bundled connection cable for external accessories 
NOTE / If you are purchasing this or trying to set it up, you will need to buy replacement external RP-SMA antennas online to get functional Wi-Fi coverage