His earpiece works with all Motorola radios that required single 2.5mm jack. Motorola Talkabout T Series T4000, T6000, T7000, T8000, T9000,T4800, T4900, T5000, T5100, T5146, T5200, T5300, T5320, T5400, T5410, T5412, T5420, T5422, T5500, T5512, T5522, T5532, T5550, T5600, T5620, T5700, T5710, T5720, T5725, T5800, T5820, T5900, T5920, T5950, T6200, T6210, T6220, T6222, T6250, T6300, T6310, T6320,T6400, T6500, T6510, T6550, T7100, T7150, T7200, T7400, T7450,T8500, T8550, T9500, T9550, T9500R, T9500XLR, T9550XLR, T9580XLR, T9650, T9680.
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