Main Features: ● K / M head earphone This earphone is suitable for K / M head walkie talkie. ●PTT - IN - LINE remote control structure The earphone has PTT - IN - LINE remote control structure. It makes the sounds clear and prevents noise. ●100cm length It is 100cm length, meets your daily needs. ● Suitable for the most M / K head walkie talkies ● PC material, C type ear hook ● Can both be hung on left / right ears and clip on your cloth ● Fit for police, military, bouncer, and businessman, etc.