How to find the hardware version on a TP-Link device
How To Download And Upgrade The Latest Version Of Firmware | Tp-Link WIFI Router - YouTube
Amazon.com: TP-Link N300 Wireless Extender, Wi-Fi Router (TL-WR841N) - 2 x 5dBi High Power Antennas, Supports Access Point, WISP, Up to 300Mbps : Electronics