Radiation-proof: Air acoustic tube protect your body by reducing radio waves radiation. Anti-noise: The Soft plastic earbud fits snugly to either left or right ear and deliver a great sound even in noisy places acoustic tube.It also make you a handsome or . Built-in microphone with an inline PTT(Push To Talk) button that clips on your shirt, so you can use your radio device to communicate discreetly and easily, whether you're in security, retail or hospitality. High quality transparent acoustic tube headset that could hardly be detected by people around you(also reduces electronic radiation), for surveillance purposes and security at airports, casinos, crowd control, conventions, concerts and other working environment requiring discreet communications. Compatible with for 2-Pin jack two way radio including CP040, CP140, CP160, CP180, P100, P140, P145, P160, P165, P180, P185, XT420, XT460, DTR 2430, DTR 2450, G15, G18 Banda PMR446 Radio, Marine VHF Transceiver, (HYT) TC-500, TC-508, TC-518, TC-518 OBR, TC-580, TC-610, TC-700, PD412, PD502, PD562. Colour: black Material: plastic Package Contents: 4 x radio headset Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.