Active noise reduction; triple-layered noise-canceling tech; behind the head walkie talkie headset with microphone and ANC chipset and in-ear speakers; whether crews over-revving engines or herding cattle through a combines thunder; keep your world quiet ^^ Transparent mode; off-road or on the track; mud and dust can't stop clear communication; behind-the-head two-way radio headset features a transparent mode; you can hear surrounding communication without removing your headset ^^ Forget discomfort; behind the head walkie talkie headsets headband is flexible; durable; and built to last; whether youre strapped into a race car or a rock buggy; these cans stay put; no hotspots; no headaches; just go ^^ Dual PTT buttons to use; racing headset with mic features PTT buttons on both the headset shell and the cable; providing flexible communication options; whether you're coordinating at a racetrack or working on a farm; ensures communication seamlessly ^^ K head 2 pin; radio headset for Retevis H777H RT21 RT22 RT68 RT85 RT86 H777S RT27 RT21H RA79 RA89; compatible with Baofeng UV-5R 5RM BF-888S/pxton/Arcshell AR-5/Kenwood/Samcom twoway radios etc