Listen-Only Earpiece, Product Type Listen-Only Earpieces, Compatible Radio Brand Universal, Compatible Radio Series Universal, Compatible Radio Manufacturer Model Number 2.5mm Connector, Compatible Radio Grainger Model Number 33UH48, 33UH49, 33UH51, 494N99, 4NPD6, 4NPD7, 6XTP0, 6XTR6, 6XTY5, 6XUD1, 6XUE2, Earpiece Style Earbud, Number of Wires 1, Push To Talk No, Microphone Location Not Applicable, Radio Connector Type 2.5mm Connector, Earpiece Connection Type Wired, Earpiece Color Black