The WRT1900ACV2 is a dual-band, open-source Wi-Fi router from Linksys that features a 1.2 GHz dual-core ARM processor and four antennas for high performance and range. It includes a USB 3.0 and a dual eSATA/USB 2.0 port for connecting external devices. While the router can run the original Linksys firmware, it is also compatible with open-source firmware like OpenWrt and DD-WRT. Key features Processor: 1.2 GHz dual-core ARM CPUWireless: Dual-band AC1900 speeds with four antennasPorts: USB 3.0 and eSATA/USB 2.0Firmware: Supports original Linksys firmware, as well as custom firmware like OpenWrt and DD-WRTPower: Requires a 12V DC power adapter, with a 3A current rating Compatibility and support Open Source: The device is well-supported by open-source firmware projects like OpenWrt, which offer more advanced configuration options.Firmware: OpenWrt uses a dual-firmware flashing layout, which means it flashes alternating partitions to ensure a fallback in case of a failed update.Compatibility: It has a specific version number (\(v2\)) and FCC ID (\(Q87-WRT1900ACV2\)), so it's important to use the correct firmware for this specific model.Hardware Mods: The device has a serial port with a specific pinout (GND, Tx, Rx) that is useful for hardware modifications or advanced debugging.