FeaturesAC2500Dual-Band (2.4 GHz + 5 GHz)Secure networkIntelligent self-configuring wireless networkComplete control and easy set upExpand your existing  network system with the BT Whole Home WiFi System Add-On. This additional disc will only work when added to BT\'s Whole Home Wi-Fi solution to further expand your superfast, super-reliable WiFi network. With a mighty AC2500 wireless punch Whole Home WiFi puts what matters most at your fingertips. It talks to all your gadgets to make sure they\'re always automatically connected to the fastest and strongest signal. And it\'s bristling with brilliant controls that put you in charge of a supercharged home network. This is WiFi at its finest. With BT Whole Home WiFi you can have your favourite TV, films, music and games in any room you wish. No more dead spots. Even when there\'s a laptop connected in the kitchen, smartphones upstairs and a tablet in the lounge - they all stay connected, all the time.Please Note: This device can only be used in England, Wales, Scotland and Northern Ireland, due to restrictions on using WiFi frequencies in the 5.725-5.825 band elsewhere in Europe.