An electrical connector with a first coupling device with a first connection for a first electrical cable and a second coupling device with a second connection for a second electrical cable and wherein both coupling devices are interlocking for electrical contact. The mechanical damping system comprises a tubular impact frame secured to the structure. The present invention further comprises a color-difference operational for selecting a plurality of color pixels as a basic pixel, a first color pixel, and a second color pixel. The drive roll acts frictionally on the bottom surface of the mail item and cooperates with a queuing mechanism, which is installed above and offset from the drive roll in the downstream direction to hold back excess mail items.