Radio-tone 2-wire Air Acoustic Tube EarPiece w/mic for RT4

2-Wire Headset w/Transparent Tube 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, it is also commonly used for security at airports, casinos, manufacturing plants, croed-control at conventions and concerts, and other working environment requiring discret communications. The earphone kit has the following features: Low-profile, flexible, transparent acoustic tube transmit sound in high quality; the transparent tube would be hardly noticed by others around you; The plastic earbud fits snugly to your ear canal; The hidden microspeaker is located in the centre of PTT switch.   suit for: Radio-Tone RT4