4MB flash is extremely tight. You will have to use a stripped-down build (no LuCI web interface, only CLI). Consider upgrading flash chip or buying a more capable router.

: The intended hardware model, a 300Mbps Wireless N Speed Wi-Fi router. The TL-WR850N: ISP vs. Retail

These are not all from one device. They appear to be fragments from two different TP-Link router firmwares and possibly a Dell laptop BIOS or driver string.

It is highly unusual to see a string like in standard technical documentation. This specific combination appears to be a firmware version string , a bootloader code , or an engineering build tag extracted from a low-level system dump—most likely from a TP-Link TL-WR850N router.

The TL-WR850N by TP-Link is a wireless dual-band router designed to provide high-speed internet access to multiple devices simultaneously. With its advanced features, such as MU-MIMO technology, it can handle the demands of modern networking environments, including 4K streaming, online gaming, and the connection of numerous IoT devices.