***** **********Best Quality Guranteed. *****The earpiece is made of durable PU material*****With this radio earpiece that includes a state-of-the-art, in-line PTT microphone, its easier than ever to use your radio device for hands-free communication No distortion, attenuation or frequency jumps*****Earbud Adopts the soft silicone, comfortable enough to forget it's there*****Big size PTT and wearing gloves does not affect the key operation*****The two way radio earpiece is compatible with leading radio headset brands Kenwood, Puxing, Wouxun, Baofeng. DON'T WORK FOR Motorola and Midland Radio