Microphone, Product Type Microphone, Compatible Radio Type Desktop, Handheld, Compatible Radio Brand Ritron, Compatible Radio Series Jobcom JBS, Compatible Radio Manufacturer Model Number JBS-147M, JBS-147D, JBS-447D, JBS-447D-LIBERTY, Compatible Radio Grainger Model Number 423J11, 423J12, 423J13, 423J14, Earpiece Jack Size 2.5 mm, Radio Connector Type 1-Pin Mic Plug, Noise Prevention Not Applicable, Push To Talk Yes, Intrinsically Safe Yes, Keypad Included No, Material Polycarbonate