Universal Original Intercom Micphone Earpiece for 888S UV5R 3.5mm K-Head 2-pin Jack Earphone Compatible for Baofeng Two-Way Radio Earplug can be rotated left and right ears and wear comfortably. Earphone compatible for Baofeng Two-Way Radio and most of 2-pin jack walkie talkies Pormer pin diameter of 3.5 mm and 2.5 mm in diameter after pin, double pin from 8 mm within, 11 mm center distance of 2 pin.: UV5R, BF-480/490/320/V6/V7/V8/658/520/530/999/888/777/666S/777S/888S Has a remote microphone with push to talk button you can clip anywhere. Relevant personnel : police, military, bouncer, and businessman .