D-Link Whole Home Wi-Fi Mesh System, 4X4 Wi-Fi Router and Seamless Extender (COVR - 3902) PLUS Additional Add-on Seamless Extender (COVR-1300E). All like new in perfect condition. Add-on extender in original box. Great for large homes! From the manufacturer: The Covr Advantage The Covr AC3900 Whole Home Wi-Fi System uses a High-Power AC2600 Wi-Fi Router at its core to handle the bulk of your Wi-Fi activity, creating a PowrZone of blazing fast Wi-Fi speeds, while the Seamless Wi-Fi Extender takes care of the outer edge. Description COVR uses a High-Power AC2600 Wi-Fi Router at its core to handle the bulk of your Wi-Fi activity, creating a PowrZone of blazing fast Wi-Fi speeds, while the Seamless Wi-Fi Extender takes care of the outer edge. Designed for power users, the COVR solution is perfect for 4K streaming and gaming on multiple devices. Smart Roaming Technology, Forget about traditional Wi-Fi extenders which require you to connect to different networks as you move around your home, the new COVR AC3900 Whole Home Wi-Fi System uses Smart Roaming technology to ensure your entire home is covered by a single, seamless network (one SSID) and that you are always connected to the strongest signal available. As you move from room to room and floor to floor you'll experience an uninterrupted connection, with NO buffering, drop-outs or deadspots. Features & details MU-MIMO Technology - High-bandwidth Wi-Fi signal to multiple devices at the same time Smart Steering - Focused Wi-Fi Signals for faster more reliable connections Dynamic Adaption - Load balancing to ensure the 2.4GHz and 5GHZ bands are optimized Seamless Roaming - Devices seamlessly connect to the strongest signal Scalable - Add Extenders as coverage need increases