Speaker Microphone: Use high impact ABS and Polycarbonate plastic housings for ruggedness Use High quality speaker and noise-cancelling mic provide loud and clear sound Environmental PU cable reinforced with coiled cord Microphone with sturdy plastic 360° rotating clip. The microphone can be clipped on the collar or shoulder position Microphone with 3.5mm audio jack Undergone comprehensive testing including high altitude performance, vibration, mechanical shock, thermal cycling, external short circuit and overcharge test simulations U94 PTT: Button activated PTT (push to talk) unit with a strong back clip which provides a secure attachment Made of high quality ABS, compact size and convenient to carry The metal clip on the back for carrying on vest/strap Easy installation and easy to manipulate Compatible with Motorola models: For EM Series: EM1000, EM1000R, EM1010TPR, EM1020R For MR Series: MR350R, MR355R, MR356R For MH Series: MH230R For MB Series: MB140R For MC Series: MC220R, MC225R, MH230R For MJ Series: MJ270R For TLKR Series: TLKR T3, TLKR T4, TLKR T5, TLKR T6, TLKR T7, TLKR T8, TLKR T9, TLKR T60, TLKR T80, XTB446, XTR446, XTL446, PMR446 Spirit GT/GT plus SX500, SX620R, SX700, SX709R, SX750, SX800, SX900, SX920R FR50, FR60 F60, FV200, FV200R, FV200AA, FV300, FV500, FV500R, FV500AA, FV600, FV700, FV750, FV800 T270, T280, T289 T4000, T4512, T7000, T4800, T4800AA, T4900, T4900AA T5000, T5000AA, T5100, T5146, T5200, T5300, T5320, T5400, T5410, T5412, T5420, T5422, T5500, T5500AA, T5512, T5522, T5532, T5550, T5600, T5620, T5700, 5710, T5720, T5725, T5800, T5820, T5822, T5900, T5920, T5950, T5950AA T6000, T6200, T6210, T6212, T6220, T6222, T6250, T6300, T6300AA, T6310, T6312, T6320, T6322, T6400, T6412, T6500, T6510, T6550, T6512, T6552R, T6500AA T7000, T7100R, T7150R, T7200, T7200AA, T7400R, T7400AA, T7450R, T7100, T7150, T7200, T7400, T7450 T8000, T8500, T8550 T9000, T9500, T9550, T9500R, T9500XLR, T9550XLR, T9580XLR, T9650, T9680 etc...