1.Transparent tube earphone microphone for interphone; 2.You can listen and speak clearly without holding a walkie-talkie. 3. Transparent tube SPK, good concealment effect, is conducive to the confidentiality of communication; 4.Suitable for Hytera Radio: TC-268,TC-268S,TC-270,TC-270S,TC-368,TC-368S,TC-370,TC-370S Kenwood TH Series: TH-D7,TH-F6,TH-F7,TH-G71,TH-K2,TH-21,TH-22,TH-25,TH-26,TH-27,TH-28,TH31AT,TH41AT,TH-42,TH-45,TH-46,TH-47,TH-48,TH-55,TH-G71,TH-75,TH-77,TH-205,TH-215,TH-225,TH-235,TH-315,TH-415 Kenwood TK Series: TK-208,TK-220,TK-240,TK-248,TK-250,TK-260,TK-270,TK-308,TK-320,TK-340,TK-348,TK-350,TK-353,TK-360,TK-370,TK-372G,TK-373G,TK-378G,TK-388G,TK-430,TK-431,TK-2100,TK-2101,TK-2102,TK-2107,TK-2118,TK-2160,TK-2201,TK-2202,TK-2206,TK2207,TK-3100,TK-3101,TK-3102,TK-3107,TK-3118,TK-3160,TK-3201,TK-3202,TK-3302U-K,TK-3206,TK3207,TK-3312,TK-3360,TK-3402U16P Linton Radio: LT-2188,LT-2260,LT-2268,LT-2288,LT-3107,LT-3188,LT-3260,LT-3268,LT-3688,LT-6188,LT-6288 Nexedge Series: NX-220,NX-320 PUXING Radio: PX-666,PX-777,PX-777PLUS,PX-888,PX-999 WOUXUN Radio: KG-659,KG-659Plus,KG-669,KG-669PLUS,KG-679,KG-679Plus,KG-689,KG-689PLUS,KG-699E,KG-UVD1,KG-UVD1P RETEVIS Radio: H-777,RT-5R,RT-5RV,RT1,RT2,RT5,RT7,RT3,RT8,RT81,RT21,RT22,RT23,RT24 BAOFENG Radio: UV5R,UV8,UV8D,UVB5,UVB6,A52 ,UV5RA,UV5RC,UV5RD,UV5RE,UV5RE+,F8,F8+ BF-480/490/320/V6/V7/V8/658/520/530/999/888/777/666s/777s/888s/F8+/A5/388A POFUNG Radio: UV-A52,UV-82,UV-8,UV-6,UV-5R,888s,5RA for QUSHENG/LINTON/TYT etc. Size: 16 mm Frequency: 200 ~ 5000 hz Sound pressure: 85 db + / - 3 db Impedance: 90 Ω plus or minus 10% Audio: 100 mw The microphone: Size: 9.7 * 5.0 mm Frequency: 20 ~ 16000 hz Spirit: lightness - 36 db + 2 db Impedance: 2.2 K Ω" Package include:1pcs earpiece. Weight:64g. Notice: If your walkie-talkie type is not in the list above, please see store other products.