Listen-Only Earpiece Product Type Listen-Only Earpieces Compatible Radio Brand Motorola Compatible Radio Series Universal Compatible Radio Manufacturer Model Number 3.5 Threaded Connector Compatible Radio Grainger Model Number 31MG68 Earpiece Style Earbud Number of Wires 1 Push To Talk No Microphone Location Not Applicable Radio Connector Type 3.5mm Threaded Earpiece Connection Type Wired Earpiece Color Black