1.COMPATIBILITY-Compatible with MOTOROLA XTS Series: XTS1500, XTS2000, XTS2250, XTS2500, XTS3000 XTS3500, XTS5000 , XTS5100, XTS 5000R HT1000, HT2000, JT1000, PR1500, MT1500, MT2000, MTS2000, ASTRO / FJohnson: 51SL, 5000, 5100, 7700 SERIES/ GP Series: GP900 , GP1200, GP9000/ MTX Series: MTX838, MTX 900, MTX960, MTX 8000, MTX9000 MTX-LS, MTX-B5, MTX-B7, etc. 2.BIG PTT BUTTON-with a big PTT button by the side, the function of push-to-talk can help you open the microphone quickly. Sensitive push to talk button switch that are easy to handle even if you're wearing thick gloves. Easy to carry with the small handheld size. 3.3.5MM AUDIO JACK-the handheld speaker mic has a 3.5mm earphone jack for audio receive to make it possible to use in noisy environments. If you don't want others to hear sound, just need to attach a 3.5mm listen only earpeice. 4.ROTATING CLIP-with a 360 °rotatable clip, it's convenient to clip the radio microphone in anywhere. No matter clip on clothes or backpack, easily for a shoulder mic to use. With the stretchable coil cord and rugged cable, the radio speaker mic can be more flexible to speak and hear the high quality clear sound without lifting radio.