M4 Mini is designed to aggregate 4 Sim, 1 Ethernet to create a single rebust pipeline for delivering video/data. The combination of several network connections allows broadcasters to reinforce their video by sending traffic over multiple routes, repacking at the destination with rock-solid dependability.
It only works as bonding router and cannot be used as a standard encoder. It does have the advantage of being light, and convenient for carry, and also no need cables when outdoor live broadcasting.
You can connect up to 4 sim cards and Ethernet max, which allow you to transmit video or data via bonding server with Linux Debian Above 9.0 OS. Bonding server can be built yourself or rent from Ali could/ Amazon server.