4-099 series (with Mini Din Plug) :
The two-wire earphone kit provides excellent durability, reliability and performance in low-profile environment. This is ideal for demanding covert security applications where sound clarity and durability are of paramount importance. Apart from surveillance purposes.
The plastic earbud fits snugly to your ear canal.
Low-profile, flexible, transparent acoustic tube transmit sound in high quality; the transparent tube would be hardly noticed by others around you.
This earpiece can provide several plugs: