ARC S11035 Heavy Duty Speaker Microphone fit Motorola Dual Pin. 

PRODUCT FEATURES:

• IP54 Rated Dust&Water Protection
• 3.5mm Sealed Audio Jack for Earpiece
• RJ-45 Field Repairable Cable
• High Impact Resistant Polycarbonate Enclosure
• Knowles Microphone
• DuPont Kevlar Fiber Reinforced Cable

Fits:

GP1280, GP140, GP320, GP328, GP329, GP338, GP339, GP340, GP360, GP380, GP640, GP650, GP680, GP960, HT1250, HT1250LS, HT1550, HT1550XLS, HT750, MTX8250, MTX8250LS, MTX850, MTX850LS, MTX9250, MTX950, PRO5150, PRO5350, PRO5450, PRO5550, PRO5750, PRO7150, PRO7350, PRO7450, PRO7550, PRO7750, PRO9150, PTX-700, PTX760, PTX780