Features A remote microphone with push to talk button you can clip anywhere The transparent tube connecting the ear bud makes you look like a secret service agent or a body guard and protects you from radiation The ear bud speaker fits snugly to ear which keeps your conversations private Specification Length of the cable Plug to PTT 100cm Length of the cable PTT to Speaker 108cm Two pin standard diameter Ear 3 5mm stereo top pin Mic 2 5mm stereo bottom pin Space of two pin 11mm Color Black Microphone Dimensions 6 2 7mmSensitivity 38dB3dBFrequency 1kHzImpedance 2 2KOhm Speaker Diameter 15mmImpedance 110OhmSensitivity 106dB4dBRated power 0 5WMaximum power 1W Compatibility BrandModelfor KenwoodKPG27D KPG29D KPG48D KPG49 KPG55D KPG56D KPG62D KPG66D KPG69D KPG70D KPG74D KPG75D KPG77D KPG82D KPG87DTH F6 F6A D7 D7A D7AG D7E F7 F7E G71 G71A G71E K2 K2A K2E K2ET 21 21AT 21BT 22 22A 22AT 22E 25 26 27 28 31AT 31BT 41AT 41BT 42 42A 42AT 2E 45 46 47 48 55 75 77 G71 205 215 225 235 235A 235E 315 41TK 208 220 240 240D 248 250 260 260G 270 270G 308 360G 370 370G 372G 373G 320 340 340D 348 350 378 378G 430 431 353 360 2100 2102 2130 2160 3100 3101 3102 3107 3118 3130 3131 3160etc for RetevisRetevis H777 Retevis 888s Plusfor HYTTC286 386 2685 3865 6685 TC 278 3