Separable loadbreak connectors include an interference element spaced about the contact tube that is configured to engage a portion of a connector piston. The methods of the invention include the processes of barcode vouchers printing, barcode vouchers storage, game, reading, and prize-claiming. An extendable portion is movably mounted to the handle section and has two dents. The masking agent can have a grain size comprised between 10 and 100 m, with a Gaussian distribution. The apparatus has a file management controller which enables a user to select and release the selection of the MP3 file directories read from the storage medium and a reproduction unit which reproduces or repetitively reproduces only MP3 files belonging to the MP3 file directory selected by a reproduction or repetitive reproduction command. The apparatus and methods embodied in the present invention are particularly useful for high-throughput and low-cost single-molecular analysis.