A simultaneous dual band router is essentially two routers in one. One band, the clearer 5Ghz frequency, can be used with 5Ghz devices for interruption sensitive applications like HD video streaming and online gaming, while the traditional 2.4Ghz band, which can sometimes experience interference from household appliances such as microwaves and cordless phones, can be used with 2.4 Ghz devices for basic applications such as surfing the web and e-mail.
With TPlink TL-WDR4300 router & TD-W8980 modem dual band feature, one can share faster, further & more.
Check out TL-WDR4300 Router HERE and TD-W8980 Modem HERE.