The droids were a variant on the MSE-series mouse droid, but modified to perform minor technical repairs as well as to hover on tiny repulsorlift engines. They were equipped with a recording unit for both audio and visual data, two tool mounts, two telescoping arms and an internal comlink. The droids were cheap, friendly and utilitarian. It was a very popular droid, especially in the Cularin system, and it was financially successful for the droids of Uffel. At one time, having one or two MSF droids was a sign of affluence.