10 X SUNDELY&reg; Volume Control for Motorola Radio CP200 EX600 GP329 HT1550 PRO7150 MTX900 10 X Volume Control for Motorola Radio CP040, CP140, CP160, CP180, CP200 EP350, EP450, EX500, EX600 GP328, GP338, GP329, GP339, GP340, GP344, GP360, GP380, GP388, GP640, GP644, GP680, GP688, GP1280, GP3188, GP3688 HT750, HT1250, HT1550, MTX850, MTX900, MTX960, PRO3150, PRO5150, PRO7150, PTX700, PTX760