1. Red-Fire 2-pin Walkie Talkies Earpiece Covert Air Acoustic Tube PTT MIC In-ear Headset Compatible with ICOM IC-F3011/ F4011/ F4001/ F1000/ F2000/ F3210D/ F3230D/ T70A/ V80/ F3G/ F4G/ F11S/ F14/ F14S/ F21/ F24/ F24S Two-Way Radios. 2. The covert acoustic tube walkie talkie headset delivers crisp, clear sound even in noisy places, demonstrating an accurate and high-quality audio experience. 3. Professional metal plating connectors, using electroplating anti-oxidation design, effectively improve the headset's lifespan, avoiding poor contact situations. 4. The 2-way radio headsets feature an ergonomic earplug that fits snugly in the ear canal, reducing the vacuum pressure generated by single headphones and are not easy to fall out; wearing them for a long time will not feel tiring. 5. This radio headset includes a state-of-the-art, in-line PTT microphone, making it easier than ever to use your radio device for hands-free communication. No distortion, attenuation, or frequency hopping.