If you are looking into the hardware for your research, these are the standard units and accessories: RNS 330 Plus (Noname/187B)
Based on the standard abbreviation used in university course catalogs, typically refers to "Religious Studies 330: The History of God." (Commonly associated with universities like Arizona State University).
: Be aware of different versions like the Desay (often limited to CarPlay) versus the NoName (typically supports both CarPlay and Android Auto).
Most models feature a 6.5-inch capacitive touchscreen that is significantly more responsive than older resistive screens like those on the RNS 510.