... assembly line production as the mainstay. The main products are: speaker, power switch (buttonswitches, toggle switches, micro switch), CRT tube socket ... video jack(RCA jack),headphone jack, touch switches, S-Video, speaker, utensils inputsocket (AC power outlet), DC power socket, rectangular socket ... patronage, sincere cooperation, the grand total. Earphone Jack( EJ-3.5-1)