This WiFi amplifier, as a relay device magnifying average WiFi signal strength, effectively expands indoor network coverage by matching devices with the strongest signal available in real time and provides instant device / network checking via smartphone app. Designed with the concept of “Mobile Antenna” as one of its recognizable features, the 180° axis offers flexible angular adjustment for suiting varying network environments and localities. It works with most of the mainstream routers in the market and supports quick pairing via one-time USB plug-in to other MI routers, creating a pioneering experience of network hardware interaction.