KENMAX 2 Pin Noise Cancelling Overhead Earpiece Headset with Boom Mic for Two Way Radio Kenwood Baofeng Wouxun Linton Puxing Weierwei Quansheng HYT TYT (2 PACKS) Great audio on transmit and receive;It is very comfortable to wear and fully adjustable Noise cancelling, provides excellent durability, reliability and performance in low-profile environment. The earpiece have great transmission and excellent in the noise environment to keep your smooth communication. Ideal for demanding covert security applications where sound clarity and earpiece durability are of paramount importance. Former pin diameter of 3.5 mm and 2.5 mm in diameter after pin with double pin from 8 mm and 11 mm center distance of 2 pin