Cloud Hosted Router (CHR) is a RouterOS version intended for running a virtual machine. It supports the x86 64-bit architecture and can be used on most of the popular hypervisors such as VMWare, Hyper-V, VirtualBox, KVM and others. CHR has full RouterOS features enabled by default but has a different licencing model than other RouterOS versions.
The p-unlimited (perpetual-unlimited) licence level allows CHR to run indefinitely. It is the highest tier licence and it has no enforced limitations.