The Mi Router 4A is powered by a MediaTek MT7628DA chipset paired with 64MB RAM. There is also 16MB ROM onboard. It has one 100M WAN port and two 100M LAN ports. This model is suitable for families with broadband below 100M, and can stably connect 64 devices. On the other hand, the Router 4A Gigabit features an 880MHz dual-core four-thread processor and 128MB RAM. Xiaomi says the router is suitable for 100M broadband homes and can stably connect 128 devices. They also come with specially treated metal substrates, combined with high-radiation nano-materials in other to achieve excellent heat-dissipating ability, thus effectively reducing the chip temperature and improving system stability.

The Mi Router 4A provides two frequency bands of 2.4 GHz and 5 GHz without mutual interference. The dual-band concurrent wireless connection rate can reach up to 1167 Mbps. The 2.4GHz frequency band has longer transmission, better coverage, and better wall penetration performance. The 5GHz frequency band uses 802.11ac technology, with less interference and high speed. It is smoother to watch high-definition video and play large online games. Its outer casings are made from environmentally-friendly matte plastic material and has four external high-gain antennas. It run MiWROM based on OpenWRT deep customization.