A human machine interface (HMI) device comprises a power recognition component that determines at least one power source that is providing power to the HMI device, wherein the at least one power source is one of a host device providing power by way of a Universal Serial Bus connection, an AC power source, a DC power source, and a battery. A selector component can automatically select a subset of functionalities to enable with respect to the HMI from amongst several possible functionalities based at least in part upon the at least one determined power source.