OpenWRT Installation Tutorial on a N600 TL-WDR3600 Router - YouTube
WDR3600 N600 Wireless Dual Band Gigabit Router User Manual TP-Link Technologies
NeweggBusiness - TP-LINK TL-WDR3600 Dual Band Wireless N600 Router, Gigabit, 2.4 GHz 300 Mbps + 5 GHz 300 Mbps, 2 x USB port, IP QoS, Wireless On / Off Switch