2-Way Radio Speaker Mic for BF-888S UV-5R UV-5RA UV-5RB Walkie Talkie Microphone Handheld Speaker Two-pin standard diameter: Ear 3.5mm stereo (top pin). Mic 2.5mm stereo (bottom pin) Mic for BAOFENG handheld Radio: UV-5R, UV-5RA, UV-5RB, UV-5RC, UV-5RD, UV-5RE, UV-5RE plus, BF-888S, BF-777S, BF-666S, UV-8 UV-82 Kenwood handheld Radio: TK-240, TK-250, TK-255, TK-260, TK-260G, TK-270, TK-270G, TK-272G, TK-278, TK-278G, TK-340, TK-349, TK-350, TK-353, TK-360, TK-360G, TK-370, TK-370G, TK-373G, TK-378, TK-378G, TK-430, TK-431, TK-715, TK-2100, TK-2102, TK-2107, TK-2118, TK-2160, TK-3100, TK-3101, TK-3102, TK-3107, TK-3118, TK-3160 PLEASE NOTE:The 3.5 jack for the earpiece is not real, just a decoration. The speaker mic has an small iron clip on the back, so, not only can you hold it on your hand but also can hung it on your shoulder or arms when patrolling to free your hands. It is most popular in police & security personnel, and mostly used for patrol duty, large team activities, business activities and senior entertainment venues.