Durable PTT button allows push for hands-free calling; sensitively captures clear and loud sound for transmission* Built-in ptt button, easy to operate.Can be applied to the following radio models:Fit For Motorola* T270, T280, T289, T4000, T4800, T4500, T4700, T4800, T4900, T5000, T5022, T5030R, T5100, T5146, T5200, T5320, T540, T540T5412, T5420, T5422, T5428, T5432, T5500, T5512, T5522, T5530, T5532, T5500, T5550, T5600, T5620, T5700, T5710, T570, T572T5820, T5822, T5900, T5920, T5950, T6000, T6100, T6200, T6210, T6212, T6220, T6222, T6250, T6300, T6310, T6320, T6320, T620, T620T6412, T6500, T6510, T6530, T6550, T6512, T6552R, T6500AA, T6600, T6700, T6800, T6900, T7000, T7100R, T7150R, T7400T7400AA, T7450R, T7100, T7150, T7200, T7400, T7450, T7500, T7600, T7700, T7800, T8000, T8500, T8550, T9000, T9500RT9500XLR, T9550, T9550XLR, T9580XLR, T9650, T9680* TLKR: TKLR T3, TKLR T4, TLKR T5, TLKR T6, TLKR T7, TLKR T8.* EM1000, EM1000R, EM1020R, EM1010TPR.* MR350R, MR355R, MR356R, MH230R, MB140R.* MC220R, MC225R, MH230R, MD200TPR, MJ270R, MS350R, MS355R, MS356R, MT350R, MT352R.* XTR446, XTL446, PMR446.* SX500, SX600, SX620R, SX700, SX709R, SX750, SX800, SX900, SX920R* FV200, FV200R, FV200AA, FV300, FV500, FV500R, FV500AA, FV600, FV700, FV750, FV800, FR50, FR60.*Spirit GT, Spirit GT+