Both right and left ear can be comfortably wornThe headset fits perfectly in your ear easily to keep your conversations privateRelevant personnel: Police, and businessmanRelated sites: Nightclubs, , , security, restaurants, hotels, airports, casinos, manufacturing, conferences, concerts, warehouses and noisy environmentsStandard two-pin diameter: 3.5mm stereo (upper pin). 2.5mm stereo microphone (bottom pin)Two-pin space: . 11mmCompatible devices:For KPGKPG27D,KPG29D,KPG48D,KPG49,KPG55D,KPG56D,KPG62D,KPG66D,KPG69D,KPG70D,KPG74D,KPG75D,KPG77D, KPG82D,KPG87DFor TKTK-208/ TK-220/320 TK-240/340 TK-240D / 340D,TK-248/348 TK-250/350/353 TK-260/360 TK-260G / 360G TK-270/370 TK-270G / 370G TK-272G / 372G / 373G TK-278G / 378G / 388GPro-Talk,TK-430/431 TK-2100 / 3100Pro-Talk,TK-2102/3102 Pro-power TK-2107 / 3107 pro-talk TK2207,TK3207,TK-2160/3160Material:ABScolour:blackPackage Contents:1 * Earpiece HeadsetOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.