4-006RT3  2-wire Air Acoustic w/mic for RT3 & F22

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.   　 -Extended length of acoustic tube: 45 cm; -Two wires extend from PTT switch, one to the acoustic tube adapter (70cm) and another to the radio (75cm); -Weight :56g. 　 suit for: Radio-Tone RT3 Smart Walkie Talkie F22