Klein Radio Audio Adapter K9717 converts the Motorola multi-pin connector to fit these radios: GP1280, 140, 320, 328, 329, 338, 339, 340, 360, 380, 640, 650, 680, HT1250, 1250LS, 1550, 1550XLS, 750, MTX8250, 8250LS, 850, 850LS, 9250, 950, 960, PR860, PRO5150, 5350, 5450, 5550, 5750, PRO7150, 7350, 7450, 7550, 7750, 9150, PTX700, 760, 780. (Adapts M2 connector type to M4 connector type.)