2 pole 1/4" professional phone plug, right-angle, gold plated contacts, black plated. The ultimatePLUG combines the functions of the silentPLUG and timbrePLUG in one product. The ultimatePLUG automatically mutes (shorts) an instrument (guitar) cable to avoid pops and squeals when changing the instrument (guitar) under load. The integrated silent switch is based on REED-technology and guarantees a lifetime beyond 10 '000 mating cycles.