User manual TP-Link Archer C9 (English - 143 pages)
How to upgrade the firmware version of TP-Link wireless router (Blue UI)
How to update software on TP-LINK Archer C9? - HardReset.info
Amazon.com: TP-Link AC1900 Smart Wireless Router - Beamforming Dual Band Gigabit WiFi Internet Routers for Home, High Speed, Long Range, Ideal for Gaming (Archer C9) : Electronics
How to upgrade the firmware version of TP-Link wireless router (Blue UI)