A mobile inventory management system which reduces cost and inventory time. A first aim of the present invention is to provide an adapter system which allows automatically providing an output video signal that is co-timed to the master timing reference of the remote equipment. The device includes at least one pointed element 7,8,9 for electrical contact with the line 4. The V-hull portion may include a keel as a forward apex, which forms a substantially perpendicular or vertical leading wedge with respect to the plane of water. An operation information acquirer acquires operation information that denotes a content of an operation that the worker has executed on the displayed data. They are therefore useful for the treatment, control, or prevention of diseases and disorders responsive to the modulation of MC-4R, such as obesity, diabetes, nicotine addiction, alcoholism, sexual dysfunction, including erectile dysfunction and female sexual dysfunction.