Check the listing for details. H-250 VCEB US Military Radio Handset with Ear Bud Assembly NIB Volume Control. Condition: New. Listed at 49.95 USD. US H-250 VCEB Military Radio Handset with Ear Bud Assembly NIB Volume ControlThe H-250VCEB handset offers the soldier the freedom to control all audio functions on the handset, without having to reach for the radio. Secure quiet listening is achieved simply by plugging in the external cleartube earphone. Specifications Termination U-229/U Application Standard US Military Radios Mating U-183/U Built-In PTT Yes, With Bezel PTT Type Make / Break Sequence Volume Control Rotary Switch Earphone Jack Built-In Microphone Type Dynamic Mic Impedance 150 Ohms Mic Frequency Response 300 to 4500 Hz Mic Sensitivity 10 Mv RMS Microphone Directivity Noise Cancellation Earphone Type Dynamic Earphone Impedance 1000 Ohms Earphone Frequency Response 300 to 3500 Hz Earphone Sensitivity 354 Mv RMS Military Spec MIL-PRF-49078A Immersion 1 Meter / 2 Hours Temperature Range c -45 to +65 Temperature Range (f) -40 to +150 Housing Material Polycarbonate Glass Color Non-Reflective Black Cord Type Retractile Length 2 Meter Number of Contacts 5 Other PN H-250VCEB NSN 5965-01-549-6390