TENQ 2 PIN Covert PTT Acoustic Tube Earpiece MIC for Motorola Two Way Radio Devices GP88 300 2000 CT150 P040 PRO1150 SP10 XTN500 (3 Pack) Transparent tube SPK has excellent concealment which makes communication more private Ear bud style headset with built-in line microphone;Covert acoustic tube transmits more clear sound Two-pin standard diameter: Ear 2.5mm stereo (top pin). Mic 3.5mm stereo (bottom pin);Space of two-pin: 8mm Super Quality,more stubborn and durable;Big size PTT, wearing gloves does not affect the key operation;Hidden microphone is located in the side of PTT switch Notice: If your radio model not listed above, please email us your model number, we will help you find one that suit for you