Extendable Size: Telescopic design, Adjustable to suits neck size between 12 inch and 15 inch. Sound :Dual-mic transponders designed on both the left and right side, sound is absorbed via vibrations from the throat and transferred to the radio which is then converted into recognizable voice frequencies. So, the throat microphone eliminates most background noise whether in the battle field or on the job .Snug Fit Transparent Silicone earplugs:The mushroom shaped acoustic tube earpiece is the best choice for long-hour operation. throat mic is available in a professional grade acoustic ear coil. The proprietary, ergonomic design of the ear cushions ensures good fit over a wide range of ear sizes. Anti-noise and no ear damage. Transparent Acoustic Tube:Transparent catheter, easily hidden. You may the throat mic under the collar and the transparent tube earphone is not easily detected by the s. for discreet communications. ysis Of Experimental s:You may found cheaper throat mics (come with 1 mic on one of the sides) in the market, but sound quality will tell the difference. We have tested a number of similar products and this one is simply the best in transmitting voices in their authentic tones. ur:blackMaterial:ABSPackage Contents:1 * For Nato Plug Telescopic Throat Mic for Walkie Talkie ( PTT is not included) the above package content, products are not included.Note: shooting 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.