... are: speaker, power switch (buttonswitches, toggle switches, micro switch), CRT tube socket, audio and video jack(RCA jack),headphone jack, touch switches, S- ... sockets, a variety of wiring blocks and auxiliary function switch more than a dozen majorcategories, hundreds of kinds of specifications ... foreign businessmen patronage, sincere cooperation, the grand total. Earphone Jack(CK3-2.5-2-4P)