A system, in certain embodiments, includes a spray device including a frame having a receptacle configured to receive a self-contained spray can. A data filter filters the logged to data to eliminate redundancies and decrease the data storage requirements of the system. In addition to that a method for detecting the presence of microwave signals is proposed. A portion of the second housing may be located behind the other end portion of the first housing in the second direction, when the second housing is in the first position. A plurality of bookmarks that associate to a single file are stored in the file synchronization system, each such bookmark respective to a different user. The sensor may be configured to detect a position of the movable component relative to the sensor or a position of the friction surface relative to the sensor.