**********2 way radio earpiece fit for Motorola walkie tlakies; 2 pin standard diameter; ear 2.5 mm stereo (top pin); mic 3.5 mm stereo (bottom pin); space of two-pin is 8mm*****Covert acoustic tube allows you get private low profile conversations in noise background; the soft ear bud gives you a comfortable wearing experience a for a long time*****Thanks to the clip; you could clip the built in mic to your collar close to your mouth for pick up clear and loud voice to transmit*****Sensitive microphone can transmit your voice clearly to your teammates; the big PTT provides you totally hands free experience*****Excellent for use in police; military; nightclubs; bars; paintball; security; restaurants; hotels; bouncer; warehouses and outdoors