Speaker Microphone, Product Type Speaker Microphone, Compatible Radio Type Handheld, Compatible Radio Brand Motorola, Compatible Radio Series HT1250, HT1550, HT750, PRO5150, PTX760, RG725, Compatible Radio Manufacturer Model Number 329Plus, EX500, EX560, EX560XLS, EX600, EX600XLS, GP328Plus, GP344, GP388, GP644, GP688, Compatible Radio Grainger Model Number Not Applicable, Earpiece Jack Size 3.5 mm, Radio Connector Type M5, Noise Prevention Windporting, Push To Talk Yes, Intrinsically Safe No